🍩 Make the Glaze
While the cake cools, whisk together powdered sugar, milk, and vanilla extract in a small bowl. Adjust the milk for desired thickness—it should drizzle slowly off a spoon.
Once the cake is just slightly warm, drizzle the glaze over the top, letting it naturally run down the sides for that irresistible donut-style finish.
✨ Serve & Enjoy
You can let the glaze set before slicing… or dig in while it’s still warm and the glaze is melting into the crumb. Each bite is soft, buttery, gently spiced, and bursting with sweet-tart blueberries—a donut transformed into cake form.
