In a large mixing bowl, combine the cake mix, egg, oil and water.
Then, gently fold in chopped strawberries until well combined.
Spoon batter into donut pan (approximately ⅓ full in each cavity). Do not overfill the donut cavities. You can also use a piping bag to fill the cavities with less mess!
Bake donuts for approximately 13-14 minutes. Remove and allow to cool on a cooling rack for at least 10 minutes before applying glaze.
To create the glaze:In a small bowl, whisk together the powdered sugar, vanilla and milk until you have a creamy texture.
Dip the donuts into the glaze and top with sprinkles.