Gather all your ingredients for both the cake and the glaze.
In your mug, combine the cake ingredients: melted butter, almond flour, cinnamon, sweetener blend, baking powder, and egg. Stir until smooth.
In a separate small bowl, combine the glaze ingredients: 1 1/2 tbsp melted butter, 1/2 tbsp sweetener blend, and 1 tbsp cream cheese. Microwave for 25 seconds, then mix until smooth.
Add half of the glaze to the mug cake batter. Swirl it in with a toothpick. Microwave for 60 seconds, or until risen and cooked through.
Reheat the remaining glaze mixture in the microwave for 15-second intervals until fully melted and smooth.
Carefully remove the mug cake from the mug by scraping the sides with a knife and inverting it onto a plate.
Pour the warm glaze over the inverted cake.
Serve immediately and enjoy your warm, gooey keto treat!
Notes
Nutrition information is an estimate, calculated automatically. Values vary with brands, substitutions and portion sizes.