1
In a large microwave-safe mug, combine flour, granulated sugar, brown sugar, baking powder, salt, and cinnamon. Mix well.
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2
Stir in the milk until the mixture forms a thick batter. If too thick, mix in another splash of milk. Gently fold in the blueberries.
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3
Microwave on high for about 1 minute to 1 minute and 45 seconds, or until the muffin is set. Cooking time will vary depending on your microwave and mug size.
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