01 -
Preheat oven to 400°F. Grease your donut pan thoroughly to prevent sticking.
02 -
Trim the strawberries and add them to a food processor. Pulse until you have a chunky puree, being careful not to over-process into complete liquid. Set aside.
03 -
In a large mixing bowl, mix together the butter, sugar, and egg on medium-high speed for about 2 minutes until well combined. Add in the vanilla extract, buttermilk, and strawberry puree and mix again until blended.
04 -
Add both flours, baking soda, baking powder, and salt to the wet ingredients and mix on low speed just until incorporated. Be careful not to overmix. Scrape down the sides of the bowl if needed.
05 -
Transfer batter to a large piping bag or freezer bag (tip: place the bag in a cup and fold it over the sides for easier filling). Cut a small corner off the bag and pipe the batter into the donut tin, filling each cavity only halfway.
06 -
Bake for 7-8 minutes on the middle rack until the donuts are set and spring back when lightly touched.
07 -
While the donuts are baking, whisk together powdered sugar and milk in a bowl until smooth.
08 -
Remove donuts from the pan while still warm and place on a wire rack. Pour glaze over each donut, allowing excess to drip off, or dip the tops of each donut into the glaze. Let the glaze set for 20-30 minutes before serving.