After mincing 1 cup of fresh (or thawed) strawberries, place them on a paper towel and pat to remove any excess moisture. Then place them in a small bowl and toss with 2 tablespoons of flour. Set aside.
Fill your donut pan about 3/4 full with your donut batter. Bake in your preheated oven for 10 - 12 minutes. Allow to cool in the donut pan for at least 8 minutes and then carefully transfer to a wire cooling rack to cool completley.