01 - Combine warm milk and yeast in a large bowl. Let sit for 5 minutes until the mixture becomes foamy, indicating the yeast is active.
02 - Add sugar, melted butter, eggs, and salt to the yeast mixture. Mix thoroughly to combine. Gradually incorporate flour, mixing until a soft, slightly sticky dough forms.
03 - Turn dough onto a floured surface and knead for 8 to 10 minutes until smooth and elastic. Place in a greased bowl, cover with plastic wrap, and let rise in a warm, draft-free area for 1 hour or until doubled in size.
04 - Mix brown sugar and cinnamon in a small bowl until well combined. In a separate bowl, toss blueberries with 1 tablespoon flour to coat evenly and prevent bleeding into the dough.
05 - Punch down risen dough and roll into a 16x12 inch rectangle. Spread softened butter evenly over the surface, sprinkle with cinnamon-sugar mixture, then distribute floured blueberries across the dough.
06 - Starting from the longer side, roll dough tightly into a log. Using a sharp knife or dental floss, slice into 12 equal pieces approximately 1 1/2 inches thick.
07 - Arrange rolls cut-side up in a greased 9x13 inch baking dish. Cover and let rise in a warm place for 30 to 45 minutes until puffy and nearly doubled.
08 - Preheat oven to 350°F. Bake rolls for 22 to 25 minutes until golden brown on top and cooked through. The center should register approximately 190°F when fully baked.
09 - While rolls bake, whisk powdered sugar, milk, and vanilla extract until completely smooth. Adjust consistency with additional milk if needed for desired drizzling texture.
10 - Drizzle warm vanilla glaze evenly over rolls immediately after removing from oven. Serve warm for best texture and flavor experience.