Preheat oven to 350°F. Grease and line your pans like a responsible adult.
Sift flour, baking powder, soda, and salt together. No clumps, no chaos.
Beat butter and sugars until light and dramatic.
Add eggs one by one, mixing like your reputation depends on it.
Stir in espresso mix, vanilla, and sour cream.
Fold in dry ingredients gently. This is cake, not cardio.
Divide into pans and bake for 30 minutes or until golden and toothpick-approved.
Cool on a wire rack and resist poking it.
For buttercream: whip butter till fluffy, then beat in sugar gradually.
Add espresso liquid, vanilla, salt, and cream if needed. Frost like a star.