Ingredients
Method
Preparation
- Preheat oven to 180°C (350°F) and line baking sheets with parchment paper.
- Cream the butter and sugar until fluffy.
- Beat in the egg and vanilla.
- In another bowl, whisk flour, baking powder, salt, and cornstarch.
- Add the dry ingredients to the wet mixture and mix until a dough forms.
- Divide the dough in half.
- To one half, add cocoa powder and milk. Mix until fully combined.
- Wrap both pieces of dough and chill for 30–60 minutes.
- Roll each piece of dough into equal rectangles.
- Layer the chocolate dough over the vanilla dough and roll tightly into a log.
- Wrap and chill again for at least 1 hour.
Baking
- Slice the chilled log into ¼ inch rounds and place on prepared baking sheets.
- Bake for 10–12 minutes until set.
- Cool on trays briefly, then transfer to a wire rack to cool completely before serving.
Notes
Store cookies in an airtight container at room temperature for up to a week. For longer storage, freeze them well-wrapped in plastic and store in a freezer bag. Thaw or reheat briefly before serving.
