In a large mixing bowl, whisk together flour, cocoa powder, baking powder, baking soda, espresso powder, and salt.
2 (250g) cups all-purpose flour, 4 (25g) tablespoons Dutch-process cocoa powder, 1½ teaspoons baking powder, 1/2 teaspoon baking soda, 1/4 teaspoon espresso powder, 1/2 teaspoon kosher salt
Using a cheese grater or a food processor using the grating attachment, grate your cold butter into bits.
1/2 (113g) cup unsalted butter
Add the butter to the dry ingredients, and coat all of the butter with the dry ingredients and the butter forms pea sized crumbles.
Add the mini chocolate chips, honey, sourdough discard, milk or buttermilk, and vanilla to the dough.
1/3 (100g) cup honey, 1/3 (80g) cup sourdough discard, 1/3 (80g) cup buttermilk, 1/3 (60g) cup mini semi-sweet chocolate chips, 2 teaspoons vanilla extract
Mix the dough with your hands or a pastry blender until the dough starts to ball together. Add the milk or buttermilk to the dough and use your hands to bring the dough together to from a rough ball.