01 -
Set oven to 400 degrees Fahrenheit.
02 -
Hull and trim the strawberries, then pulse in a food processor until a chunky puree forms. Avoid over-processing to maintain some texture.
03 -
Beat together unsalted butter, granulated sugar, and egg in a large mixing bowl on medium-high speed for 2 minutes until light and fluffy.
04 -
Add strawberry puree to the creamed mixture and blend to combine.
05 -
Sift in cake flour, all-purpose flour, baking powder, and salt. Mix on low speed until just combined, scraping down the bowl as needed. Do not overmix.
06 -
Transfer batter into a large piping or freezer bag. Place bag in a large cup for stability, use a rubber spatula to fill, seal, and snip one corner of the bag.
07 -
Lightly grease donut pan. Pipe batter into each cavity, filling each no more than halfway.
08 -
Place tin on the middle oven rack. Bake for 7 to 8 minutes, or until donuts spring back lightly when touched.
09 -
In a medium bowl, whisk together powdered sugar and milk until smooth.
10 -
Once baked donuts are cool enough to handle, transfer to a wire rack. Drizzle or dip each donut in glaze, allowing excess to drip off. Let glaze set for 20 to 30 minutes before serving.