Best Blueberry Muffins

Will need:
2 cups all-purpose flour
1 T. baking powder
1/2 tsp. table salt
1 large egg
1 cup granulated sugar
4 T. unsalted butter, melted and cooled slightly
1 1/4 cups sour cream
2 cups fresh blueberries

1. Adjust oven rack to middle position and heat oven to 350 degrees. Spray standard muffin tin with nonstick vegetable cooking spray.

2. Whisk flour, baking powder, and salt in medium bowl until combined. Whisk egg in second medium bowl until well-combined and light-colored, about 20 seconds. Add sugar and whisk vigorously until thick and homogenous, about 30 seconds; add melted butter in 2 or 3 steps, whisking to combine after each addition. Add sour cream in 2 steps, whisking just to combine.

3. Add berries to dry ingredients and gently toss to combine. Add sour cream mixture and fold with rubber spatula until batter comes together and berries are evenly distributed, 25 to 30 seconds (small spots of flour may remain and batter will be thick). Do not overmix.

4. Use ice cream scoop or large spoon to drop batter into greased muffin tin. Bake until light golden brown and toothpick or skewer inserted into center of muffin comes out clean, 25 to 30 minutes, rotating pan from front to back halfway through baking time. Serve as is or use the sugar-topped variation.

Sugar-topped variation:
While muffins are cooling, mix 1/2 cup of sugar and 1/2 tsp. ground cinnamon in small bowl and melt butter in small saucepan. After baked muffins have cooled five minutes, working one at a time, dip tops of muffins in melted butter and then cinnamon-sugar. Set muffins upright on wire rack; serve.