"Dear SOS: I had the best muffin I've ever had in my life at Sweet Butter in Sherman Oaks. It was a coffee doughnut muffin. I thought I had had good muffins before, but this was like the best cappuccino ... Read more..."
INGREDIENTS
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4 cups (17 ounces) flour
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1 tablespoons plus 1 teaspoon baking powder
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1 teaspoon salt
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2 to 3 tablespoons espresso powder, divided
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3/4 cup plus 2 tablespoons prepared coffee
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1/2 cup buttermilk
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1 teaspoon vanilla extract
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1 1/2 cups (3 sticks) softened butter, plus  3/4 to 1 cup (1 1/2 to 2 sticks) melted butter, divided
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3 1/2 cups (24 1/2 ounces) sugar, divided
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4 eggs