Chocolate Hazelnut Espresso Shortbread - Dinner With Julie

Ingredients

• 1 1/2 cups all purpose flour
• 1 cup packed brown sugar
• 1/2 cup cocoa
• 3 Tbsp. cornstarch
• 1 Tbsp. instant espresso or coffee (or finely ground espresso beans)
• 1/4 tsp. salt
• 1 cup butter, cold and cut into chunks
• 1 tsp. vanilla
• 3/4 cup hazelnuts, toasted, skinned, and coarsely chopped
• 1/2 cup chocolate chips (optional, to drizzle)