With electric mixer, cream together cream cheese, butter and sugar.
Add eggs and buttermilk and mix until well incorporated.
Stir in flour.
Fold in blueberries.
Divide evenly among a 12 cup muffin tin that has been sprayed with a non-stick spray or covered with muffin wrappers.
Bake at 400 degrees for 25 minutes or until tops are golden brown and a toothpick inserted comes out clean.