Step 1: Preheat and Prepare
Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
Step 2: Mix Dry Ingredients
In a bowl, whisk together the flour, baking soda, and salt. Set aside.
Step 3: Cream Butter and Sugars
Beat the softened butter with granulated and brown sugars until light and fluffy.
Step 4: Add Wet Ingredients
Add the egg and vanilla extract. Mix well.
Step 5: Combine Wet and Dry Ingredients
Gradually add the dry ingredients to the wet mixture and stir until combined.
Step 6: Add White Chocolate Chips
Fold in the white chocolate chips, ensuring an even distribution.
Step 7: Make Espresso Swirl
Dissolve the instant espresso powder in hot water to form a smooth paste.
Step 8: Shape the Cookies
Drop rounded spoonfuls of cookie dough onto the prepared baking sheet.
Step 9: Add Espresso Swirl
Drizzle a small amount of espresso swirl over each cookie, then swirl it into the dough.
Step 10: Bake and Cool
Bake for 12-15 minutes until the edges are golden. Cool on the baking sheet for a few minutes before transferring to a wire rack.