diff --git a/src/Roux/Html.hs b/src/Roux/Html.hs
index 936ff9c..d2c0298 100644
--- a/src/Roux/Html.hs
+++ b/src/Roux/Html.hs
@@ -14,6 +14,7 @@ module Roux.Html (
     importResultPage,
     indexPage,
     recipePage,
+    cookHistoryPage,
     urlEncode,
     urlDecode,
 ) where
@@ -35,6 +36,9 @@ import Text.Blaze.Html5 as H
 import Text.Blaze.Html5.Attributes as A
 
 import Data.CookLang
+import Data.Time.Calendar (Day)
+import qualified Data.Time.Format as Time
+import qualified Roux.CookLog as CookLog
 import qualified Roux.RecipeIndex as Idx
 
 -- ---------------------------------------------------------------------------
@@ -625,6 +629,54 @@ titleEditJs =
         , "})();"
         ]
 
+-- | Inline JavaScript for cook log form submission.
+cookLogJs :: Text
+cookLogJs =
+    T.unlines
+        [ "(function(){"
+        , "'use strict';"
+        , "var form = document.querySelector('.roux-cook-log-form');"
+        , "if (!form) return;"
+        , "var dateInput = form.querySelector('[name=cooked-date]');"
+        , "if (dateInput && !dateInput.value) dateInput.value = new Date().toISOString().slice(0,10);"
+        , "form.addEventListener('submit', async function(e) {"
+        , "  e.preventDefault();"
+        , "  var fd = new FormData(form);"
+        , "  var filename = form.dataset.filename;"
+        , "  var res = await fetch('/cook-log/' + encodeURIComponent(filename), {"
+        , "    method: 'POST',"
+        , "    body: fd"
+        , "  });"
+        , "  if (!res.ok) {"
+        , "    var err = await res.json();"
+        , "    alert(err.error || 'Failed to log cooking');"
+        , "    return;"
+        , "  }"
+        , "  var date = fd.get('cooked-date');"
+        , "  var comment = fd.get('comment');"
+        , "  var entryDiv = document.createElement('div');"
+        , "  entryDiv.style.margin = '0.3rem 0';"
+        , "  entryDiv.style.fontSize = '0.9rem';"
+        , "  var dateLine = document.createElement('strong');"
+        , "  dateLine.style.display = 'block';"
+        , "  dateLine.style.textAlign = 'center';"
+        , "  dateLine.style.color = 'var(--muted)';"
+        , "  dateLine.textContent = '\x2014\x2014 ' + date + ' \x2014\x2014';"
+        , "  entryDiv.appendChild(dateLine);"
+        , "  if (comment) {"
+        , "    var commentSpan = document.createElement('span');"
+        , "    commentSpan.style.display = 'block';"
+        , "    commentSpan.style.marginTop = '0.2rem';"
+        , "    commentSpan.textContent = comment;"
+        , "    entryDiv.appendChild(commentSpan);"
+        , "  }"
+        , "  var container = form.nextElementSibling;"
+        , "  if (container) container.prepend(entryDiv);"
+        , "  form.querySelector('[name=comment]').value = '';"
+        , "});"
+        , "})();"
+        ]
+
 sseIndexJs :: Text
 sseIndexJs =
     T.unlines
@@ -766,8 +818,8 @@ importResultPage (ImportError msg) =
         H.h2 "Import failed"
         H.p $ H.toHtml msg
 
-recipePage :: Idx.RecipeInfo -> ByteString
-recipePage info =
+recipePage :: Idx.RecipeInfo -> [CookLog.CookEntry] -> ByteString
+recipePage info entries =
     case Idx.riRecipe info of
         Left err ->
             page "Parse Error" $ do
@@ -778,7 +830,7 @@ recipePage info =
                 sseScript
         Right recipe ->
             page (titleText recipe) $ do
-                renderRecipe (Idx.riFilename info) recipe
+                renderRecipe (Idx.riFilename info) recipe entries
                 hiddenRecipeSpan info
                 sseScript
   where
@@ -790,10 +842,41 @@ recipePage info =
         H.script ! A.type_ "text/javascript" $ H.preEscapedText timerJs
         H.script ! A.type_ "text/javascript" $ H.preEscapedText recipeImageUploadJs
         H.script ! A.type_ "text/javascript" $ H.preEscapedText titleEditJs
+        H.script ! A.type_ "text/javascript" $ H.preEscapedText cookLogJs
+
+-- | Render the cook log section in the marginalia column.
+renderCookLog :: FilePath -> [CookLog.CookEntry] -> Html
+renderCookLog _ [] = pure ()
+renderCookLog filename entries = do
+    H.h2 "Cook history"
+    H.form
+        ! A.class_ "roux-cook-log-form"
+        ! H.dataAttribute "filename" (H.toValue (T.pack filename))
+        ! A.style "display: flex; gap: 0.3rem; margin-bottom: 0.5rem;" $ do
+        H.input ! A.type_ "date" ! A.name "cooked-date"
+        H.input ! A.type_ "text" ! A.name "comment" ! A.placeholder "Optional note..."
+                 ! A.maxlength "500" ! A.style "flex: 1;"
+        H.button ! A.type_ "submit" $ "Log it"
+    H.div ! A.class_ "roux-cook-entries" $ do
+        mapM_ renderEntry entries
+
+-- | Render a single cook log entry.
+renderEntry :: CookLog.CookEntry -> Html
+renderEntry entry = do
+    H.p ! A.style "margin: 0.3rem 0; font-size: 0.9rem;" $ do
+        H.strong ! A.style "display: block; text-align: center; color: var(--muted);" $
+            H.toHtml ("\x2014\x2014 " <> formatDay (CookLog.ceCookedDate entry) <> " \x2014\x2014")
+        unless (T.null (CookLog.ceComment entry)) $
+            H.span ! A.style "display: block; margin-top: 0.2rem;" $
+                H.toHtml (CookLog.ceComment entry)
+
+-- | Format a Day as "Mon DD" e.g. "Mar 15".
+formatDay :: Day -> Text
+formatDay = T.pack . Time.formatTime Time.defaultTimeLocale "%b %e"
 
 -- | Render the body of a recipe page (no page shell).
-renderRecipe :: FilePath -> Recipe -> Html
-renderRecipe filename recipe = do
+renderRecipe :: FilePath -> Recipe -> [CookLog.CookEntry] -> Html
+renderRecipe filename recipe entries = do
     H.nav ! A.class_ "roux-navbar" $ do
         H.ul $ H.li $ H.a ! A.class_ "roux-logo" ! A.href "/" $ "Roux"
         H.ul $ H.li $ H.a ! A.href "/" $ "Recipes"
@@ -847,6 +930,7 @@ renderRecipe filename recipe = do
                 H.div ! A.class_ "note" $ do
                     H.h2 "Tags"
                     H.p $ H.toHtml (T.intercalate "  ·  " recipeTags)
+            renderCookLog filename entries
             unless (null notes) $ do
                 H.h2 "Notes"
                 mapM_ renderMarginalNote notes
@@ -1112,3 +1196,32 @@ isLeft _ = False
 -- | Check if an 'Either' is 'Right'.
 isRight :: Either a b -> Bool
 isRight = not . isLeft
+
+-- | Render the cook history page (all entries across recipes).
+cookHistoryPage :: [(Text, [CookLog.CookEntry])] -> ByteString
+cookHistoryPage grouped =
+    page "Cook History" $ do
+        H.nav ! A.class_ "roux-navbar" $ do
+            H.ul $ H.li $ H.a ! A.class_ "roux-logo" ! A.href "/" $ "Roux"
+            H.ul $ do
+                H.li $ H.a ! A.href "/" $ "Recipes"
+                H.li $ H.a ! A.class_ "active" ! A.href "/cook-history" $ "Cook History"
+        H.h1 "Cook History"
+        mapM_ renderMonthGroup grouped
+
+renderMonthGroup :: (Text, [CookLog.CookEntry]) -> Html
+renderMonthGroup (month, entries) = do
+    H.h2 $ H.toHtml month
+    H.ul ! A.style "list-style: none; padding: 0;" $ do
+        mapM_ renderHistoryEntry entries
+
+renderHistoryEntry :: CookLog.CookEntry -> Html
+renderHistoryEntry entry = do
+    H.li ! A.style "margin-bottom: 0.5rem;" $ do
+        H.strong $ H.toHtml (formatDay (CookLog.ceCookedDate entry))
+        " — "
+        H.a ! A.href (H.toValue ("/recipes/" <> CookLog.ceRecipeFilename entry <> ".cook")) $
+            H.toHtml (CookLog.ceRecipeFilename entry)
+        unless (T.null (CookLog.ceComment entry)) $ do
+            H.br
+            H.span $ H.toHtml (CookLog.ceComment entry)
diff --git a/src/Roux/Server.hs b/src/Roux/Server.hs
index 5e7ad99..e47f105 100644
--- a/src/Roux/Server.hs
+++ b/src/Roux/Server.hs
@@ -47,8 +47,13 @@ import qualified Data.Aeson.KeyMap as KM
 import qualified Data.ByteString as BS
 import Data.Maybe (fromMaybe, mapMaybe)
 import qualified Data.Text.Encoding as TE
+import qualified Database.SQLite.Simple as SQL
+import Data.Time.Calendar (Day, fromGregorianValid)
+import qualified Data.Time.Format as Time
+import Text.Read (readMaybe)
 import Roux.Config (AnthropicConfig (..), RouxConfig (..))
 import qualified Roux.CooklangPrint as CooklangPrint
+import qualified Roux.CookLog as CookLog
 import qualified Roux.Html as Html
 import qualified Roux.RecipeIndex as Idx
 import Roux.SchemaOrg (SchemaOrgRecipe (..), parseSchemaOrgRecipe, schemaOrgToCooklang)
@@ -95,7 +100,11 @@ app recipeDir config = do
         forkIO $
             watchRecipes absDir state changeLog `catch` \e ->
                 putStrLn $ "[roux] watcher thread crashed: " <> show (e :: SomeException)
-    pure (router absDir config state changeLog)
+    -- Initialize cook log database
+    let dbPath = recipeDir </> "cook-log.db"
+    db <- CookLog.initDb dbPath
+    putStrLn $ "[roux] cook log DB: " <> dbPath
+    pure (router absDir config state changeLog db)
   where
     isRight (Right _) = True
     isRight (Left _) = False
@@ -177,8 +186,8 @@ sseHandler changeLog _request respond = do
             go `finally` pure ()
 
 -- | Route requests — SSE endpoint, recipe pages, or import.
-router :: FilePath -> RouxConfig -> IORef (Map FilePath Idx.RecipeInfo) -> ChangeLog -> Wai.Application
-router recipeDir config state changeLog request respond =
+router :: FilePath -> RouxConfig -> IORef (Map FilePath Idx.RecipeInfo) -> ChangeLog -> SQL.Connection -> Wai.Application
+router recipeDir config state changeLog db request respond =
     case Wai.pathInfo request of
         ["events"] -> sseHandler changeLog request respond
         ["import"] -> importHandler recipeDir config state request respond
@@ -187,7 +196,16 @@ router recipeDir config state changeLog request respond =
         ["recipes", _, "title"]
             | Wai.requestMethod request == "PATCH" ->
                 titleUpdateHandler recipeDir state request respond
-        _ -> handleRequest state request respond
+        pathInfo
+            | Just filename <- dispatchLogPost pathInfo
+            , Wai.requestMethod request == "POST" ->
+                handleCookLogPost db filename request respond
+        _ -> handleRequest state db request respond
+
+-- | Extract filename from /cook-log/{filename} POST path, if it matches.
+dispatchLogPost :: [Text] -> Maybe Text
+dispatchLogPost ["cook-log", filename] = Just filename
+dispatchLogPost _ = Nothing
 
 {- | Handle GET and POST requests to /import.
 GET  — show the import form.
@@ -604,8 +622,8 @@ reReadRecipe dir path state changeLog = do
                         putStrLn $ "[roux] updated " <> path
 
 -- | Route an incoming request to the appropriate handler.
-handleRequest :: IORef (Map FilePath Idx.RecipeInfo) -> Wai.Application
-handleRequest state request respond = do
+handleRequest :: IORef (Map FilePath Idx.RecipeInfo) -> SQL.Connection -> Wai.Application
+handleRequest state db request respond = do
     recipes <- readIORef state
     let recipeList = Map.elems recipes
     case Wai.pathInfo request of
@@ -618,10 +636,63 @@ handleRequest state request respond = do
         -- Recipe detail page
         ["recipes", rawPath] ->
             case lookupRecipe (urlDecodePath rawPath) recipes of
-                Just info -> respond (htmlResponse (Html.recipePage info))
+                Just info -> do
+                    let filename = T.pack (map toLower (stripCookExt (urlDecodePath rawPath)))
+                    entries <- CookLog.fetchEntries db filename
+                    respond (htmlResponse (Html.recipePage info entries))
                 Nothing -> respond notFound
+        -- Cook log JSON endpoint for a specific recipe
+        ["cook-log", filename] -> do
+            entries <- CookLog.fetchEntries db filename
+            let body = A.encode entries
+            respond $ Wai.responseLBS HTTP.status200
+                [("Content-Type", "application/json")]
+                body
+        -- Cook history page (all entries across recipes)
+        ["cook-log"] -> do
+            entries <- CookLog.fetchAllEntries db
+            let grouped = groupEntries entries
+            respond $ htmlResponse (Html.cookHistoryPage grouped)
         _ -> respond notFound
 
+-- | Handle POST /cook-log/{filename}
+handleCookLogPost :: SQL.Connection -> Text -> Wai.Application
+handleCookLogPost db filename request respond = do
+    body <- readRequestBody request
+    let params = parseFormBody body
+        dateStr = fromMaybe "" (lookup "cooked-date" params)
+        comment = lookup "comment" params
+    case parseDate dateStr of
+        Just day -> do
+            _ <- CookLog.insertEntry db filename day comment
+            let resp = Wai.responseLBS HTTP.status200 [("Content-Type", "application/json")]
+                    (LB.fromStrict (encodeUtf8 "{\"ok\":true}"))
+            respond resp
+        Nothing ->
+            let resp = Wai.responseLBS HTTP.status400
+                    [("Content-Type", "application/json")]
+                    (LB.fromStrict (encodeUtf8 "{\"error\":\"Invalid date format\"}"))
+            in respond resp
+
+-- | Parse a YYYY-MM-DD date string.
+parseDate :: Text -> Maybe Day
+parseDate t = case T.splitOn "-" t of
+    [y, m, d] -> do
+        y' <- readMaybe (T.unpack y)
+        m' <- readMaybe (T.unpack m)
+        d' <- readMaybe (T.unpack d)
+        fromGregorianValid y' m' d'
+    _ -> Nothing
+
+-- | Group entries by month label (e.g. "March 2026").
+groupEntries :: [CookLog.CookEntry] -> [(Text, [CookLog.CookEntry])]
+groupEntries [] = []
+groupEntries entries =
+    let monthKey d = T.pack $ Time.formatTime Time.defaultTimeLocale "%B %Y" d
+        groups = Map.fromListWith (++) [(monthKey (CookLog.ceCookedDate e), [e]) | e <- entries]
+        sortedMonths = reverse (Map.keys groups)
+    in [(m, Map.findWithDefault [] m groups) | m <- sortedMonths]
+
 -- | Look up a recipe by filename (case-insensitive, .cook extension optional).
 lookupRecipe :: FilePath -> Map FilePath Idx.RecipeInfo -> Maybe Idx.RecipeInfo
 lookupRecipe target =