Preheat oven to 400°F.
Grease or line 12 standard muffin cups
Combine the flour, ¾ cup granulated sugar, baking powder, and baking soda, in a large mixing bowl.
In a microwave safe measuring cup, melt the butter by microwaving in 15 second intervals until melted.
Stir the milk into the melted butter with a fork, followed by the beaten egg and vanilla.
Make a well in the center of the dry ingredients and pour the wet ingredients into the well. Using a rubber spatula, fold the dry ingredients and the went ingredients until just combined.
Gently fold in the blueberries.
In a medium mixing bowl, combine the cream cheese, granulated sugar, vanilla using a fork or a hand mixer until smooth.
Using a small cookie/ice cream scoop (a little less than a tablespoon) scoop one level scoop of muffin batter into each muffin cup, use the back of the scoop to press the batter down into the bottom of the cup. Using the same scoop, repeat with the cream cheese mixture, then top with the last 1/2 of the muffin batter
Generously top each muffin with the raw or sanding sugar.
Bake for 14-18 minutes until the tops are golden brown and a toothpick inserted into the muffin (not the cream cheese) comes out clean and dry. Cool on a baking rack.
Best served warm.