Yes, you can bake this keto blueberry mug cake. However, the muffins won't rise as much as seen in the pictures. Preheat the oven to 350°F (180°C). Divide the batter into two oven-proof ramekins and grease with butter or coconut oil. Bake both ramekins in the center rack of the oven for 15-20 minutes or until a pick inserted in the center of the cake comes out clean.