In a stand mixer bowl, combine warm milk and 1 tablespoon of sugar; sprinkle yeast over the top and let sit for 5 minutes until foamy.
Add the remaining sugar, eggs, melted butter, and salt; mix with the paddle attachment until combined.
Switch to the dough hook and gradually add flour, kneading on medium-low speed for 5 to 7 minutes until the dough is smooth and pulls away from the sides.
Transfer dough to a lightly greased bowl, cover with plastic wrap, and let rise in a warm, draft-free area for 90 minutes or until doubled in size.
Punch down the dough and roll out on a floured surface to 1/2-inch thickness.
Cut into rounds using a 3-inch donut cutter and place on a parchment-lined baking sheet.
Cover and let the cut donuts rise for an additional 30 to 45 minutes.
Heat vegetable oil in a heavy-bottomed pot or Dutch oven to 350°F (175°C).
Carefully fry donuts in batches for 60 to 90 seconds per side until golden brown, then transfer to a wire rack to cool slightly.
Prepare the glaze by whisking strawberry puree, powdered sugar, and vanilla extract in a shallow bowl until smooth.
Dip the tops of the warm donuts into the glaze and allow them to set on the rack for 10 minutes before serving.