Dessert · Argentinian
Lemon Dulce de Leche Alfajores
Lemon alfajores recipe: pale cornstarch sandwich cookies filled with dulce de leche, with weighed ingredients, rolling cues and storage guidance.
- Prep
- 55 min
- Cook
- 15 min
- Total
- 70 min
- Serves
- 20 sandwich cookies
Cook it
Method
Beat the softened butter and sugar in a large bowl for 2 to 3 minutes, until lighter and creamy. Scrape down the bowl. The butter should hold its shape before mixing; melted or oily butter makes the dough harder to handle.
Beat in the whole egg, then the yolks one at a time, scraping down the bowl after each addition. Mix in the vanilla and lemon zest. The mixture may look slightly curdled after the eggs; it will come together when the dry ingredients are added.
Whisk the cornstarch, flour, baking powder and salt in a separate bowl. Add them to the butter mixture in two batches and mix on low speed or fold by hand just until a soft dough forms. Do not keep beating once no dry pockets remain.
Divide the dough into two flat discs, wrap or cover them and chill for 30 minutes. The dough should feel cool and firm enough to roll without sticking, but it should not become rock-hard.
During the final 15 minutes of chilling, heat a conventional oven to 175°C (350°F) and line two large baking trays with baking paper. Roll one disc at a time between sheets of baking paper to about 6 mm thick, dusting with only a little flour if it sticks.
Cut 5 cm rounds and place them 3 cm apart on the trays. Gather and reroll the scraps once, handling them lightly. Aim for 40 similar rounds so they pair evenly; chill a filled tray for 10 minutes if the rounds have become very soft.
Bake for 12 to 15 minutes, one tray at a time for the most even result, until the tops look dry and the bases are only faintly golden. The alfajores should remain pale. Leave them on the tray for 5 minutes, then move them carefully to a rack and cool completely.
Turn half the cooled cookies over. Spoon or pipe about 15 g dulce de leche onto each one, stopping just short of the edge, then top with the remaining cookies and press very gently until the filling reaches the edge. Let the assembled alfajores stand for 20 minutes before serving so the filling settles; this standing time is additional to the 70-minute estimate.
Make it work
Useful substitutions
- Orange zest can replace lemon zest at the same volume for a softer citrus note. Avoid adding juice, which changes the dough's moisture balance.
- Use a thick baking-style dulce de leche. Thin caramel sauce is not a direct substitute because it can run out of the sandwiches.
- This cornstarch-rich formula still contains wheat flour. A gluten-free flour blend may absorb differently and is not a verified one-for-one substitution for this untested adaptation.
Keep it well
Storage and reheating
- Keep the unfilled, fully cooled cookie rounds in a well-sealed container for up to 2 days, then fill them when needed so they stay easy to handle.
- Because dulce de leche is a dairy filling, refrigerate assembled alfajores in a covered container within 2 hours. Under the linked USDA FSIS leftovers guidance, use them within 3 to 4 days.
- Bring refrigerated alfajores to room temperature for about 20 minutes before serving for a softer filling. Do not leave them at room temperature for more than 2 hours in total.
Recipe notes
Sources and cooking notes
The pinned source establishes the lemon-scented cornstarch cookie, dulce de leche filling and 175°C baking method. This adaptation normalizes the formula by weight and adds chilling, rolling, cutting, doneness and assembly cues.
- Cookbook:Alfajores (Latin American Sandwich Cookies) — Pinned source for the ingredient set, lemon and vanilla flavouring, cornstarch cookie structure, 175°C bake and dulce de leche sandwich format.
- AI Love Food editorial methodology — Metric normalization, balanced working formula, timing estimate, rolling dimensions, doneness cues, troubleshooting and assembly detail.
- FDA: Flour Is a Raw Food and Other Safety Facts — Guidance not to eat raw flour, dough or batter and to clean hands, utensils and surfaces after handling.
- USDA FSIS: Leftovers and Food Safety — Official guidance to refrigerate perishable leftovers within 2 hours and use refrigerated leftovers within 3 to 4 days.
Cooking tips and troubleshooting
Weigh the starch and flour
Cornstarch packs differently from flour in a cup, so weighing both dry ingredients removes a major source of variation. If the mixed dough seems very soft, chill it before deciding that it needs more flour.
Keep the cookies pale
Alfajores should be set and tender rather than deeply browned. Look for dry tops and only the faintest colour underneath. They remain fragile while hot and firm as they cool.
If the dough cracks or sticks
A cold, crumbly disc may need 5 minutes at room temperature before rolling. If it feels greasy or clings to the paper, return it to the refrigerator for 10 minutes. Use extra flour sparingly because too much can toughen the cookies.
Fill only after complete cooling
Warm cookies can soften the dulce de leche and slide apart. Pair rounds of similar diameter before filling, then press with flat fingertips near the centre rather than squeezing the delicate edges.
Scaling and tray planning
The serving calculator changes ingredient amounts, but rolling thickness, cutter size and spacing should stay the same. For a larger batch, keep unused dough chilled and bake additional trays instead of crowding them.
Recipe source and licence
Adapted by AI Love Food from Cookbook:Alfajores (Latin American Sandwich Cookies) by Wikibooks contributors (contributor history). This adapted recipe text is available under CC BY-SA 4.0. The image is credited separately.
Adapted from Cookbook:Alfajores (Latin American Sandwich Cookies). Retains the source's butter, sugar, egg, yolk, vanilla, lemon-zest, cornstarch, flour, baking-powder, salt and dulce de leche ingredient set, its creaming sequence, 175°C oven and sandwich-cookie format. Normalizes and rebalances the formula by weight, specifies 300 g filling, interprets the source's 40-cookie yield as 20 assembled sandwiches, and replaces dropped spoonfuls with a chilled, rolled 5 cm format for even pairs. Adds handling, doneness, assembly, storage and raw-flour guidance. The adapted recipe text is licensed under CC BY-SA 4.0; the separately generated illustration is not copied from Wikibooks.