Preheat oven to 350° Add the first 4 ingredients (flour, baking powder, baking soda, salt) to a medium mixing bowl. Stir to combine.
In another bowl, add the melted butter, granulated sugar, milk, yogurt, vanilla, egg, lemon zest, and lemon juice. Stir to combine, then add to the bowl of dry ingredients.
Mix the dry and wet ingredients together, then fold in the strawberries. To ensure nice & soft donuts, don't overmix.
Spray the donut pan with baking spray or nonstick cooking spray. Either with a piping bag, a plastic zipper bag with a corner snipped off, or a spoon, fill the cavities of the donut pan 3/4 full.
Bake donuts for 9-10 minutes. The edges of the donuts should be a nice dark golden color. Let donuts rest for a couple minutes, then put them on a wire rack. I like to use a silicone spatula to go around the edges of the donut to ensure they release properly. While the donuts are baking, prepare the icing/glaze by mixing the icing/glaze ingredients in a small bowl. *For an extra tangy, lemony icing, omit milk replace with extra lemon juice*
Take each donut and dip the top into the icing/glaze, then return it to the wire rack to drip (have newspaper, parchment paper, or paper towels underneath). After all donuts have been dipped, I like to dip them again, but that is optional. Best when served immediately. Enjoy!