In a medium bowl, sift the flour and cocoa powder together. Add in the baking soda, cornstarch, and salt.
1 1/4 cups All-purpose flour, 1/4 cup Unsweetened cocoa powder, 1/2 tsp Salt, 1/2 tsp Baking soda, 1 TBSP Cornstarch
Using a mixer, beat the melted butter, sugar, and brown sugar on high speed for 2 minutes.
1/2 cup Unsalted butter, 3/4 cup Regenerative Organic Certified® Cane Sugar from Wholesome, 2 TBSP Wholesome Organic Fair Trade Light Brown Sugar
Add in the vanilla and egg yolk. Mix on medium speed until combined. Add in the dry ingredients and mix on low speed until just combined.
1 tsp Pure vanilla extract, 1 Egg yolk
Preheat the oven to 350℉. Line two cookie sheets with parchment paper. Let the dough sit for 10 minutes before scooping.
Use a small cookie scoop to scoop the dough. Roll each cookie dough ball in the sugar. Place 12 cookie dough balls per cookie sheet.
1/2 cup Regenerative Organic Certified® Cane Sugar from Wholesome
Bake one sheet at a time. Bake for 8-10 minutes. Bake until the edges of cookies are set.
Let the cookies sit on the hot pan for 5 minutes before transferring to a cooling rack. Cool completely before decorating. If any of the cookies puff up too much, use your hand to flatten the cookie while warm. This will help while decorating.