Ingredients
Method
- Using an electric mixer, beat butter and sugars until light and fluffy, about 2-3 minutes, scraping sides of bowl as needed.
- Add egg yolk and vanilla bean paste or extract and beat just until well combined. Add the flour and salt and beat on low speed until just incorporated.
- Line two large baking sheets with parchment.
- Scoop cookie dough into approximately 1" balls and roll in sugar or nonpareils until completely covered. Place on prepared baking sheet a couple inches apart – you should get about 20 on a half size sheet pan. Use your thumb or the handle end of a wooden spoon to create an indent in the center of each dough ball.
- Transfer the first completed cookie sheet to freezer to chill while you complete the second sheet.
- Preheat oven to 375 degrees.
- Once oven is preheated, remove first baking sheet from the freezer and transfer to the oven. Bake for 12-14 minutes, until cookies are just set and lightly brown around the edges. Place second cookie sheet of dough balls in freezer to chill while first sheet is baking.
- Remove from oven and immediately use a rounded teaspoon or end of wooden spoon to re-indent the thumbprints, if needed. Allow to cool on baking sheet for 5 minutes before removing to wire rack to cool completely before filling.
- Combine chocolate and butter in a microwave safe bowl. Microwave on 50% power for one minute, stir and return to microwave for 30 second intervals at 50% power, stirring after each interval, until chocolate is completely melted and smooth.
- Fill pastry bag or zip lock bag with ganache. Cut a small hole in the tip of the bag and pipe ganache to fill the center of each cookie. Allow to set up at room temperature for about 1 hour.
Notes
Store at room temperature in an air tight container for up to one week.