That sounds absolutely delightful! I love a good coffee kick in a sweet treat—it’s like a mini coffee shop adventure in every bite. Just make sure the espresso isn’t too strong; a splash or two can brighten the batter, but you’ll want a sweet balance so the coffee doesn’t overpower. Maybe sneak in a hint of vanilla or a dash of sea salt to tame the bitterness and let the cake’s natural sweetness shine. And don’t forget a dusting of powdered sugar or a light glaze to finish—keep it simple, keep it bright! Have fun baking!