Preheat oven to 350 degrees F
Spray your donut pans with a non-stick baking spray.
In a large mixing bowl, add together the flour, baking powder, and salt.
Stir to combine
Set to the side.
In a separate bowl, add the milk, oil, sugar, egg, butter, and vanilla.
Stir until fully combined.
Add your dry ingredients to the wet ingredients
Now, add in your food coloring (optional). Stir until combined.
Add your strawberries and fold into the batter.
Spoon batter into donut pan
Bake for 9-10 minutes until a toothpick inserted comes out clean.
Let cool 10 minutes.