01 - Combine warm milk and yeast in a large bowl. Let stand for 5 minutes until mixture becomes foamy and fragrant.
02 - Add sugar, melted butter, eggs, and salt to the yeast mixture. Whisk until well combined. Gradually incorporate flour, mixing until a soft, slightly sticky dough forms.
03 - Turn dough onto a lightly floured surface. Knead for 8–10 minutes until smooth and elastic. Transfer to a greased bowl, cover with plastic wrap, and let rise in a warm, draft-free area for 1 hour or until doubled in volume.
04 - Combine brown sugar and cinnamon in a small bowl. In a separate bowl, toss blueberries with 1 tablespoon flour to coat evenly.
05 - Punch down risen dough and roll into a 16x12 inch rectangle. Spread softened butter evenly over surface, sprinkle with cinnamon-sugar mixture, and distribute floured blueberries.
06 - Starting from the longer edge, roll dough tightly into a log. Using a sharp knife or dental floss, slice crosswise into 12 equal pieces.
07 - Arrange rolls cut-side up in a greased 9x13 inch baking dish. Cover with a towel and let rise for 30–45 minutes until puffy and nearly doubled.
08 - Preheat oven to 350°F. Bake rolls for 22–25 minutes until golden brown and a toothpick inserted into the center comes out clean.
09 - Whisk powdered sugar, milk, and vanilla extract in a small bowl until smooth and drizzling consistency is reached.
10 - Drizzle warm glaze evenly over rolls immediately after baking. Serve warm for best texture and flavor.