Step 1: Preheat and Prep
Preheat oven to 350°F (175°C). Line a baking sheet with parchment paper.
Step 2: Mix Dry Ingredients
Whisk together flour, baking soda, and salt in a bowl.
Step 3: Cream Butter and Sugars
Beat butter, brown sugar, and granulated sugar until light and fluffy.
Step 4: Add Wet Ingredients
Add eggs and vanilla, mix until smooth. Gradually add dry ingredients.
Step 5: Prepare Mocha Swirl
Mix coffee powder, cocoa powder, and milk into a smooth mocha paste.
Step 6: Form the Cookies
Drop spoonfuls of dough on the baking sheet. Add a small amount of mocha paste in each and swirl with a toothpick.
Step 7: Bake
Bake for 10-12 minutes or until edges are golden. Let cool on a wire rack.