Start by preheating the oven to 400 degrees. Then, generously grease two ramekins, dusting them with 1 teaspoon of sugar. Shake off any excess sugar and set the bowls aside.
Begin by melting butter and chocolate in a small bowl for 1 minute, and then set it aside to cool.
Start by whipping 2 egg whites until they become foamy. Gradually incorporate the remaining 3 tablespoons of sugar into the mix while continuing to beat. Keep going until soft peaks form.
Combine 2 egg yolks, cinnamon, and cayenne with the cooled chocolate mixture, then gently fold in the egg whites.
Evenly distribute the batter into the ramekins and bake for 16 minutes, ensuring the cakes spring back when gently pressed with a fingertip.
After removing them from the oven, allow the cakes to cool for 10 minutes. Next, carefully invert them onto serving plates. If you like, you can serve them with Aztec Chocolate Glaze.
To prepare the Aztec Chocolate Glaze, start by mixing 1/4 cup of heavy whipping cream, 1/2 teaspoon of sugar, and 1/2 teaspoon of vanilla in a small bowl. Microwave this mixture for 45 seconds or until it's hot. Next, add 2 ounces of finely chopped bittersweet chocolate, along with 1/8 teaspoon of cinnamon and 1/8 teaspoon of ground cayenne pepper. Stir the mixture until it becomes smooth and glossy. Finally, drizzle this delectable glaze over your cakes and delight your taste buds.