Preheat your oven to 400 degrees Fahrenheit. Line a 12-cup muffin tin with paper liners or grease well.
In a large bowl, whisk together the flour, 3/4 cup granulated sugar, baking powder, and salt.
In a separate bowl, whisk together the melted butter, eggs, milk, and vanilla extract until combined.
Pour the wet ingredients into the dry ingredients. Mix gently until just combined; do not overmix. A few lumps are fine.
Gently fold in the blueberries.
Divide the batter evenly among the 12 muffin cups. Sprinkle the tops of the batter with the remaining 2 tablespoons of granulated sugar.
Bake for 18 to 20 minutes, or until a toothpick inserted into the center comes out clean. Let the muffins cool in the tin for 5 minutes before transferring them to a wire rack to cool completely.
While muffins cool, prepare the strawberry topping. In a medium bowl, combine the sliced strawberries, lemon juice, and 1 tablespoon of granulated sugar. Let the berries sit for at least 15 minutes to macerate.
Prepare the whipped cream. In a chilled bowl, beat the heavy whipping cream and powdered sugar with an electric mixer until stiff peaks form.
To assemble the blueberry muffin shortcake, take a cooled muffin and slice it horizontally in half, like a biscuit.
Place the bottom half on a plate. Spoon a generous amount of the macerated strawberries and their juices over the base.
Top with a large dollop of fresh whipped cream. Place the top half of the muffin over the cream. Serve immediately.
Notes
For an extra moist blueberry muffin, you can substitute buttermilk for regular milk.
If using frozen blueberries, do not thaw them; toss them lightly in a teaspoon of flour before adding them to the batter to prevent sinking.
You can make the whipped cream ahead of time, but keep it refrigerated until you are ready to serve.