Preheat oven to 350 degrees. Line a muffin tin with cupcake liners and set aside.

In a large bowl, whisk together the all-purpose flour, white whole wheat flour, cane sugar, baking powder, cinnamon, salt, and nutmeg.

Make a well in the dry ingredients and pour in the Horizon Organic Whole Milk, melted butter, eggs, and vanilla extract.

Mix until just combined. The batter should still be lumpy.

Fold in the frozen mixed berries.

Scoop the muffin batter into the lined muffin tin. Fill each muffin slot to the top, almost overfull.

Place the muffin tin on top of a cookie sheet in the oven.

Bake for 40 minutes, until the tops of the whole wheat mixed berry muffins are golden brown.

Let cool.

Whisk together the powdered sugar and Horizon Organic Half and Half. Drizzle on top of the muffins.

Refrigerate any unused portion.

To freeze: place muffins on a cookie sheet (not touching) for 3-4 hour. Once frozen, place muffins in a zip top freezer bag or freezer safe container. Defrost at 50% power for 1 minute or defrost in the refrigerator.