Best Chocolate Thumbprint Cookies - How to Make Chocolate Thumbprints

Ingredients

• 3/4 c. raw hazelnuts
• 1 1/2 c. all-purpose flour
• 1/2 c. unsweetened cocoa powder
• 1/2 tsp. baking soda
• 3/4 tsp. kosher salt
• 8 tbsp. (1 stick) unsalted butter, divided
• 4 oz. semisweet chocolate chips
• 1/2 c. packed brown sugar
• 2/3 c. granulated sugar, divided
• 1 large egg
• 1 tsp. pure vanilla extract
• 1 tbsp. whole milk
• 1/2 c. Nutella