Step 1: Preheat the Oven and Prepare the Pan

Preheat the oven to 425°F (218°C). Line a muffin tin with paper liners and set it aside. This recipe makes 9 to 10 muffins.

Step 2: Make the Streusel Crumb Topping

In a small bowl, mix flour, brown sugar, and salt. Add melted butter and stir with a fork until the mixture forms small crumbs. Set aside.

Step 3: Prepare the Muffin Batter

In a large bowl, whisk together flour, baking powder, and salt. In a separate medium bowl, whisk together egg and granulated sugar until combined. Add Greek yogurt, vegetable oil, and vanilla extract, and mix until smooth.

Slowly fold the wet ingredients into the dry ingredients using a rubber spatula. Mix gently until just combined. Do not overmix, as this can make the muffins dense.

Using a spatula, carefully fold in 1 ½ cups of diced strawberries, leaving 2 to 3 tablespoons aside to sprinkle on top later.

Step 4: Make the Cream Cheese Filling

In a small bowl, mix cream cheese, granulated sugar, cornstarch, and vanilla extract until smooth. This filling will add a creamy texture to the muffins.

Step 5: Assemble the Muffins

Fill each muffin cup with 1 tablespoon of muffin batter. Add 1 tablespoon of the cream cheese filling in the center of each. Cover with more muffin batter until the cups are about ⅔ to ¾ full.

Generously sprinkle the streusel crumbs on top. Add the reserved diced strawberries for extra flavor and color. Gently press the crumbs so they stick to the muffin batter.

Step 6: Bake the Muffins

Place the muffins in the preheated oven, then immediately reduce the temperature to 350°F (177°C). This helps the muffins rise initially, then bake evenly.

Bake for 22 to 25 minutes, or until the tops are golden brown and the centers are set. To check if the muffins are done, insert a toothpick in the center. If it comes out clean or with a few crumbs, they are ready.

Allow the muffins to cool for 5 to 10 minutes in the pan, then transfer them to a wire rack to cool completely.

Step 7: Make the Glaze

While the muffins cool, prepare the glaze. In a small bowl, mix powdered sugar with milk or cream, starting with 1 teaspoon of liquid and gradually adding more until the desired consistency is reached. The glaze should be smooth and pourable.

Drizzle the glaze over the muffins once they are completely cooled.