Mexican “Hot” Chocolate Molten Lava Cakes

Name: Mexican “Hot” Chocolate Molten Lava Cakes
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Cuisine: Mexican
Ingredients: cocoa powder (for dusting ramekins); 1/4 cup (half a stick) unsalted butter (room temperature); 2 ounces semisweet (bittersweet, or dark chocolate); 1 large egg; 1 large egg yolk; 2 Tbsp. sugar; 1 tsp. all-purpose flour; 1/2 tsp. chili powder (optional); 1/2 tsp. cinnamon (optional); pinch of cayenne; powdered sugar (for serving)