Prep Time 20 minutes mins
Cook Time 18 minutes mins
Resting Time 30 minutes mins
Total Time 1 hour hr 8 minutes mins
For best results, use room-temperature ingredients so the batter and frosting mix smoothly and rise evenly; adjust the cayenne to your preferred heat level or omit it for a mild cupcake, and taste the frosting to tweak cinnamon or vanilla as you like. Bake the cupcakes on the middle rack and avoid overmixing once the flour is added to keep them tender. If your kitchen is warm, chill the frosted cupcakes for 10–15 minutes so the buttercream sets slightly before transporting. Store leftovers covered at room temperature for a day or in the fridge for up to three days, letting them come back to room temperature before serving to fully enjoy the Mexican-inspired chocolate, cinnamon, and caramel flavors.