From delish.com - Brownie meets cake in this fun dessert from Emily Luchetti, a cookbook author and the executive pastry chef at San Francisco's Farallon. She bakes the batter in muffin cups so the edges turn crispy and chewy like a brownie, but the inside becomes soft and fluffy like a cake. **The brownie cakes can be stored in an airtight container at room temperature up to 2 days. Rewarm cakes before serving. Prep time includes cooling.