01 -
Line two large rimmed baking sheets with parchment paper and set aside.
02 -
In a large mixing bowl, beat unsalted butter and granulated sugar on medium-high speed using a handheld or stand mixer for 1–2 minutes until light and fluffy.
03 -
Add egg yolks and vanilla extract to the bowl; beat for an additional 1–2 minutes until fully incorporated.
04 -
Add all-purpose flour and salt; mix on low speed for 2–3 minutes until dough forms a rough ball.
05 -
Using a 1-inch (approximately 1 tablespoon) cookie scoop, portion dough, then roll into smooth balls with your palm.
06 -
Place dough balls on prepared baking sheets spaced 1 to 1½ inches apart. Press an indent into the center of each ball using your thumb or a small rounded spoon.
07 -
Freeze the baking sheets with dough balls for 30 minutes.
08 -
Preheat oven to 350°F.
09 -
Remove chilled dough from freezer and place 12 thumbprint cookies on the second prepared baking sheet about 2 inches apart.