The berries burst when heated, creating juicy pockets of goodness in a zesty cake.
unsalted butter, melted
pure vanilla extract
finely grated lemon zest
fresh or frozen blueberries (frozen blueberries retain their shape better than fresh)
- In a 12-ounce mug, whisk together flour, sugar, baking powder, and salt. Stir in milk, butter, vanilla, and lemon zest. Fold in blueberries. Microwave on High until just cooked through, 90 seconds to 2 minutes.
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