Ingredients
Method
- Preheat your oven to 350°F and line two baking sheets with parchment paper.
- In a large bowl, cream the butter, granulated sugar, and brown sugar for 2–3 minutes until pale and fluffy. The mixture should look lighter and feel airy.
- Add the egg and yolk, mixing until smooth. Stir in the vanilla (and espresso powder if using).
- In another bowl, whisk together flour, cornstarch, baking soda, baking powder, and salt.
- Add the dry ingredients to the wet mixture and mix just until the dough comes together. Stop as soon as you don’t see dry flour streaks.
- Chill the dough for 30 minutes. This helps the cookies bake up thick and soft and makes stuffing easier.
- Scoop dough into 16 portions (about 2 tablespoons each). Flatten one portion in your palm like a small disk.
- Place a chocolate truffle (or chocolate square) in the center, then wrap the dough around it. Pinch seams closed so the filling is fully sealed.
- Place dough balls seam-side down on the baking sheets, leaving space between them.
- Bake for 10–12 minutes. Look for lightly golden edges and tops that look set but still soft. They may look slightly underbaked in the center—that’s what you want.
- Let cookies cool on the pan for 10 minutes. This sets the outside while keeping the inside tender and the center silky.
- If you like, add a tiny pinch of flaky sea salt on top while they’re still warm. Serve warm for the best “sweet surprise” moment.
Notes
- The cookies spread too much: The dough was warm, or the butter was too soft. Chill longer and make sure the butter is room temperature, not melting. Also, check that your baking sheet isn’t hot from a previous batch.
- Filling leaked out: The dough wasn’t sealed completely. Wrap the chocolate fully and pinch seams closed. If you see a thin spot, patch it with a tiny piece of dough.
- Cookies turned dry: Usually, too much flour or too much bake time. Measure flour carefully and pull cookies when edges are golden but centers still look soft.
- Centers didn’t melt: Some truffles are firmer. Use chocolate squares or a softer truffle style, and serve warm.
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Substitutions:
- Gluten-free: Use a reliable 1:1 gluten-free flour blend. Chill dough longer and handle gently.
- Dairy-free: Use a plant-based butter stick (not tub spread). Choose dairy-free chocolate for the filling.
- Egg-free: Use a commercial egg replacer. Texture may be slightly less rich, but still soft if you don’t overbake.
