Ingredients

• 1 tablespoon vanilla extract
• 1 tablespoon instant espresso powder , Optional
• 2.5 cups all-purpose flour
• 0.75 cups unsweetened cocoa powder
• 1 tablespoon baking powder
• 0.5 teaspoons salt
• 1 cup mini chocolate chips
• 1 cup white sugar
• 3 eggs
• 0.5 cups vegetable oil

Instructions

1. 1 Preheat oven to 375 degrees F (190 degrees C). Line 2 baking sheets with parchment paper.
2. 2 Combine vanilla extract and espresso powder in a small bowl; mix until espresso powder is dissolved.
3. 3 Sift flour, cocoa powder, baking powder, and salt into a bowl; mix in chocolate chips.
4. 4 Whisk vanilla mixture, sugar, eggs, and oil together in a large bowl. Add flour mixture; stir, by hand if needed, until dough comes together and is thick and stiff.
5. 5 Divide dough into 2 equal pieces and place onto the baking sheets. Shape each piece into a log as long as the baking sheet; press down with wet hands to about 1/2 inch thickness.
6. 6 Bake in the preheated oven until firm, about 25 minutes. Remove from oven and cool until easily handled, about 5 minutes.
7. 7 Move cooled logs to a cutting board and slice into 1/2-inch long slices with a serrated knife. Return the slices to the baking sheets, placing them on their sides.
8. 8 Bake until dry, about 6 minutes per side. Remove from oven and let cool until hardened on wire racks.

Nutrition per serving