1tbspcold unsalted butter, chopped into tiny pieces
1 1/2tbspall-purpose flour
2 1/2tbspbrown sugar
1/8tspcinnamon
Instructions
Mix everything listed in muffin ingredients except blueberries into a microwave safe mug with a small whisk. Drop blueberries in, spreading them out. In a small bowl, mix streusel ingredients, until butter pieces are completely coated in the flour, sugar, and cinnamon. Sprinkle small crumbles of streusel on top of muffin batter, spreading out evenly across the surface.
Cook in the microwave for about 1 minute. Let cool for a few minutes before eating.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.