Recipe was from Sally's Baking addiction. 

* 1 and 3/4 cups (219g) **all-purpose flour**
* 1 teaspoon **baking soda**
* 1 teaspoon **baking powder**
* 1/2 teaspoon **salt**
* 6 Tablespoons (85g) **unsalted butter**, [softened to room temperature](https://sallysbakingaddiction.com/room-temperature-butter/)
* 3/4 cup (150g) **granulated sugar**
* 1 Tablespoon **lemon** **zest**
* 2 large **eggs**, at room temperature
* 1/2 cup (120g) **plain Greek yogurt** or **sour cream**, at room temperature\*
* 1 and 1/2 teaspoons **pure vanilla extract**
* 3 Tablespoons (45ml) **milk**\*
* 3 Tablespoons (45ml) fresh **lemon juice**
* 1 and 1/2 cups (210g) fresh or frozen **blueberries**, tossed in 1 Tbsp flour\*

# Crumb Topping

* 1/3 cup (41g) **all-purpose flour** 
* 2 Tablespoons (25g) packed light or dark **brown sugar**
* 1 teaspoon **lemon zest**
* 2 Tablespoons (28g) **unsalted butter**, melted

# Instructions

1. Preheat oven to 425°F (218°C). Spray a 12-count muffin pan with nonstick spray or line with cupcake liners. Set aside.
2. **Make the muffins:** Whisk the flour, baking soda, baking powder, and salt together in a medium bowl. Set aside.
3. In a large bowl using a handheld or stand mixer fitted with a paddle attachment, beat the butter and sugar together on high speed until smooth and creamy, about 3 minutes. Scrape down the sides and bottom of the bowl as needed. Add the lemon zest and beat on medium speed for 1 minute. Add the eggs, yogurt, and vanilla, and beat for 1 minute, then turn up to high speed until the mixture is combined and mostly creamy. (It’s ok if it appears somewhat curdled.) Scrape down the sides and bottom of the bowl as needed.
4. With the mixer running on low speed, add the dry ingredients, milk, and lemon juice into the wet ingredients and beat until no flour pockets remain. Gently fold in the blueberries. Avoid over-mixing. Batter is thick and fluffy.
5. Spoon the batter into prepared muffin cups, filling them all the way to the top.

Crumb topping: 

In a small bowl, use a fork to mix all of the crumb topping ingredients together. 

1. Spoon topping evenly on top of each filled muffin cup, gently pressing it down onto the surface so it sticks. Bake for 5 minutes at 425°F, then, keeping the muffins in the oven, reduce the oven temperature to 350°F (177°C). Bake for an additional 18–19 minutes or until a toothpick inserted in the center comes out clean. The total time these muffins take in the oven is about 23–24 minutes, give or take.
2. Allow the muffins to cool for 5 minutes in the muffin pan, then transfer to a wire rack to continue cooling. Enjoy warm, or at room temperature.

  


Lemon Blueberry Muffins