4In a large bowl, combine 2 cups (240g) of all-purpose flour, 1 teaspoon of salt, and 2 teaspoons of baking powder. Whisk until combined.
5In a large bowl, combine 2 cups (240g) of all-purpose flour, 1 teaspoon of salt, and 2 teaspoons of baking powder. Whisk until combined.
6In a large bowl, combine 2 cups (240g) of all-purpose flour, 1 teaspoon of salt, and 2 teaspoons of baking powder. Whisk until combined.
7In a separate large bowl, cream together ½ cup (113g) of room temperature butter and ¾ cup (150g) of granulated sugar for about a minute on low speed.
8In a separate large bowl, cream together ½ cup (113g) of room temperature butter and ¾ cup (150g) of granulated sugar for about a minute on low speed.
9In a separate large bowl, cream together ½ cup (113g) of room temperature butter and ¾ cup (150g) of granulated sugar for about a minute on low speed.
10Add 2 large room temperature eggs and mix for a few seconds on medium speed.
11Add 2 large room temperature eggs and mix for a few seconds on medium speed.
12Add 2 large room temperature eggs and mix for a few seconds on medium speed.
13Add the lemon zest (from one whole lemon).
14Add the lemon zest (from one whole lemon).
15Add the lemon zest (from one whole lemon).
16Mix on medium speed for about 2 minutes until light and fluffy.
17Mix on medium speed for about 2 minutes until light and fluffy.
18Mix on medium speed for about 2 minutes until light and fluffy.
19Add 2 teaspoons of vanilla extract and mix.
20Add 2 teaspoons of vanilla extract and mix.
21Add 2 teaspoons of vanilla extract and mix.
22Add the dry ingredients in three additions, alternating with the milk, mixing on low speed in between.
23Add the dry ingredients in three additions, alternating with the milk, mixing on low speed in between.
24Add the dry ingredients in three additions, alternating with the milk, mixing on low speed in between.
25Gently fold in the blueberries.
26Gently fold in the blueberries.
27Gently fold in the blueberries.
28Prepare the streusel topping by mixing together ½ cup flour, ½ cup sugar, ¼ cup butter, and a pinch of salt.
29Prepare the streusel topping by mixing together ½ cup flour, ½ cup sugar, ¼ cup butter, and a pinch of salt.
30Prepare the streusel topping by mixing together ½ cup flour, ½ cup sugar, ¼ cup butter, and a pinch of salt.
31Fill muffin cups about ¾ full. Top some muffins with streusel topping and others with a sprinkle of sugar.
32Fill muffin cups about ¾ full. Top some muffins with streusel topping and others with a sprinkle of sugar.
33Fill muffin cups about ¾ full. Top some muffins with streusel topping and others with a sprinkle of sugar.
34Place a ramekin filled halfway with water in the oven to prevent muffins from drying out.
35Place a ramekin filled halfway with water in the oven to prevent muffins from drying out.
36Place a ramekin filled halfway with water in the oven to prevent muffins from drying out.
37Bake at 400°F for 20 minutes, until puffed and golden.
38Bake at 400°F for 20 minutes, until puffed and golden.
39Bake at 400°F for 20 minutes, until puffed and golden.