Blueberry Coffee Cake Muffins

Ingredients

1 1/2 sticks unsalted butter, at room temperature
1 1/2 cups sugar
3 extra-large eggs, at room temperature
1 1/2 teaspoons pure vanilla extract
8 ounces (about 1 cup) sour cream
1/4 cup milk
2 1/2 cups all-purpose flour
2 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon kosher salt
2 half-pints fresh blueberries (2 cups, although I used 3 cups)

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