1. Prepare the Streusel Topping:
- In a small mixing bowl, combine flour, light brown sugar, and salt. Stir until evenly mixed.
- Add melted butter to the mixture and use a fork to whisk until coarse crumbs form. Set the topping aside to allow the butter to firm up slightly.
2. Prepare the Blueberry Muffin Batter:
- Preheat your oven to 425°F (220°C) and line a 9-cup muffin pan with paper liners. This recipe yields about 9 muffins, but it can vary depending on the size of your muffin tins.
- In a small bowl, mix flour, baking powder, and salt together. Set aside.
- In a larger bowl, whisk granulated sugar and egg until combined. Add the Greek yogurt, vegetable oil, and vanilla extract, mixing thoroughly.
- Gradually add the dry ingredients into the wet mixture, stirring until combined.
- Gently fold in 3/4 cup of blueberries that have been tossed in 1 tablespoon of flour. This helps prevent the blueberries from sinking to the bottom during baking.
3. Make the Cream Cheese Filling:
- In a separate bowl, mix the softened cream cheese, sugar, cornstarch, and vanilla extract until smooth and well combined. This mixture will create a creamy and tangy center inside each muffin.
4. Assemble the Muffins:
- Add about 1 ½ tablespoons of muffin batter to each muffin cup, using a spoon to spread the mixture evenly around the sides of the cup.
- Create a small dent in the center of each muffin and spoon about 1 tablespoon of cream cheese filling into each muffin cup.
- Top the cream cheese with a few more blueberries for added color and flavor.
- Generously sprinkle each muffin with the streusel topping, pressing it down lightly to stick to the batter.
- For a final touch, add a few more blueberries on top of the streusel for extra burst and visual appeal.
5. Bake the Muffins:
- Place the muffin tin in the preheated oven, and immediately reduce the temperature to 350°F (175°C).
- Bake for about 22-25 minutes, or until the tops are golden brown and a toothpick inserted into the center comes out clean (it may be slightly moist due to the cream cheese filling, but it should not be wet).
- Let the muffins cool in the pan for about 5-10 minutes before transferring them to a wire rack to cool completely.
6. Drizzle the Glaze:
- While the muffins cool, prepare the glaze by stirring powdered sugar with milk or cream. Start with 1 teaspoon of milk and gradually add more until you achieve a smooth, drizzle-able consistency.
- Once the muffins have cooled slightly, drizzle the glaze over the tops for an extra touch of sweetness and shine.