1-First Step: Preheat oven to 350°F. Line two baking sheets with parchment paper. This prevents sticking and ensures even baking. Gather all ingredients for smooth workflow. Dissolve 2 tbsp instant espresso powder in 2 tbsp warm water; set aside to cool. This coffee mixture infuses every bite with coffee cookies character. For gluten-free, swap flour now.

2-Second Step: In a medium bowl, whisk 2 cups all-purpose flour, 1 tsp baking powder, and 1/2 tsp salt. This creates a uniform dry mix. Baking powder gives lift; salt sharpens flavors. Vegan tip: Ensure powder is egg-free certified.

3-Third Step: In a large bowl, beat 1/2 cup softened unsalted butter and 1 cup granulated sugar with a mixer on medium for 2 minutes until fluffy. Add 2 large eggs one at a time, beating well after each. Mix in cooled coffee solution and 1 tsp vanilla extract. Scrape bowl sides for even blend. This step builds the dough’s moisture. Low-cal: Use half sugar, add stevia.

4-Fourth Step: Gradually add dry mix to wet on low speed until just combined. Dough will be soft; chill 30 minutes for easier scooping and better shape. Optional: Stir in 1 tbsp rum for authentic kick. Avoid overmixing to keep cookies tender.

5-Fifth Step: Scoop tablespoon-sized balls onto sheets, 2 inches apart. Bake 10-12 minutes until edges golden but centers soft. Cool on sheets 5 minutes, then transfer to rack. Full cool prevents frosting melt. For no-bake version, see variations below.

6-Sixth Step: Beat 8 oz mascarpone, 1/2 cup powdered sugar, and 1 tsp vanilla until fluffy, about 2 minutes. Spread or pipe on cooled cookies. Dust generously with cocoa powder. Pro tip: Dip bottoms in brewed coffee before frosting for extra soak. Vegan: Use cashew cream base.