Ingredients
Method
Preparation
- Preheat the oven to 350°F (175°C). Line two baking sheets with parchment.
- In a large bowl, beat the softened butter and packed brown sugar until light and fluffy, about 2–3 minutes. Scrape the bowl.
- Add the egg and vanilla, mixing until combined and glossy.
- In a separate bowl, whisk together the flour, baking powder, and salt.
- Gradually add the dry mix to the wet ingredients and stir until just combined. Don’t overmix; the dough should be soft and cohesive.
Assembly
- Lightly flour a work surface. Roll the dough out to about 1/4-inch thickness. Use a knife or rectangle cutter to cut even rectangles. Re-roll scraps once.
- Place half the rectangles on the prepared sheet. Spoon about 1 teaspoon of the brown sugar filling into the center of each rectangle, keeping it away from the edges.
- Top with another rectangle, pressing edges together and crimping with a fork or your fingers to seal. Dock the tops lightly with a fork to vent.
Baking
- Bake for 12–15 minutes, until the edges are just turned golden. Centers will be soft.
- Cool on the baking sheet for 5 minutes, then transfer to a rack to cool completely.
Glazing
- Whisk together powdered sugar and milk to make the glaze; drizzle or spread onto cooled cookies and add sprinkles if desired.
- Let glaze set before stacking or storing.
Notes
Store in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate for up to a week. Freeze unglazed cookies for up to 3 months. Bring to room temperature before glazing.
