Ingredients
Method
Preparation
- Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.
- In a medium bowl, whisk together the flour, cocoa powder, kosher salt, and baking powder until fully combined.
- In a large mixing bowl, beat the room-temperature butter until smooth—about 1 minute.
- Gradually add brown sugar and granulated sugar. Beat on medium speed until light and fluffy—about 2-3 minutes.
- Add the egg yolks and vanilla extract, mixing until fully incorporated.
- Gradually mix in the dry ingredients until just combined. Be careful not to overmix.
- Scoop tablespoon-sized portions of dough, roll into balls, and place them on your baking sheets, leaving some space between each ball.
- Press an indentation into the center of each ball with your thumb.
Baking
- Bake for 10-12 minutes, until the edges are set but the centers remain soft.
- Cool on the baking sheets for 5 minutes, then transfer to a wire rack.
- Spoon Nutella into the thumbprints and sprinkle with hazelnuts if using. Let them set for a few minutes before serving.
Notes
Quality ingredients enhance flavor. Store at room temperature in an airtight container for up to a week or freeze for up to 3 months. Make-ahead: Prepare the dough up to 2 days in advance.