For the Cupcakes:
Preheat oven to 350º.
Mix the flour, baking powder and baking soda in a small bowl and set aside.
In a large bowl, mix the eggs and 1/2 cup sugar until light and creamy.
Mix in the maple syrup, butter and apple butter.
Mix in the dry ingredients until just integrated.
Mix in the milk until smooth.
Fold in blueberries, granola and chocolate chunks.
Divide batter evenly between twelve cupcake liners.
Bake for twenty-five minutes or until the tops bounce back when lightly touched.
For the Whipped Cream Frosting:
Whip heavy whipping cream and 1/3 cup sugar until light and fluffy.
Optionally decorate with a fresh blueberry.