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, bring ingredients like butter, eggs, and milk to room temperature so the batter mixes smoothly and bakes evenly, and avoid overmixing once the flour is added to keep the cupcakes tender. If you toast the marshmallows, do it after the frosting has set slightly and keep the flame or broiler at a distance to prevent melting the frosting. These cupcakes are easiest to decorate when completely cool, and they can be baked a day ahead and stored airtight at room temperature, then frosted and topped just before serving for the freshest “campfire” texture. Adjust sweetness by reducing the chocolate chips slightly or using bittersweet chips, and feel free to personalize with fun add-ins like a small square of chocolate or a piece of graham cracker stuck upright in the frosting.