Wake Up the Yeast: In your large mixing bowl, combine the warm milk and yeast. Let it sit for 5-10 minutes until foamy – this means your yeast is alive and ready to party.
Sweeten the Deal: Stir in the sugar and salt. Then, add the egg and melted butter and mix well.
Flour Power: Gradually add the flour, one cup at a time, mixing until a shaggy dough forms. If using an electric mixer, switch to the dough hook and knead for 6-8 minutes until the dough is smooth and elastic. If kneading by hand, turn the dough out onto a lightly floured surface and knead for 8-10 minutes.
Rise and Shine: Place the dough in a lightly greased bowl, turning once to coat. Cover with plastic wrap or a clean kitchen towel and let it rise in a warm place for 1-1.5 hours, or until doubled in size. Patience, grasshopper, good things take time.
Roll with It: Gently punch down the risen dough and turn it out onto a lightly floured surface. Roll it into a 12x18 inch rectangle.
Filling Frenzy: In a small bowl, combine the softened butter, sugar, and cinnamon. Spread this mixture evenly over the rolled-out dough, leaving a small border along one of the long edges. Sprinkle the blueberries evenly over the butter mixture.
Roll 'Em Up: Starting from one of the long edges, tightly roll up the dough into a log. Pinch the seam to seal.
Slice and Dice: Using a sharp knife or unflavored dental floss (trust me, it works!), cut the log into 12 equal rolls.
Bake It 'Til You Make It: Arrange the rolls in your greased 9x13 inch baking dish. Cover loosely with plastic wrap or a clean kitchen towel and let them rise in a warm place for another 30-45 minutes.
Oven Time: Preheat your oven to 375°F (190°C). Bake the rolls for 20-25 minutes, or until they are golden brown and puffed up.
Glaze Glory: While the rolls are baking, whisk together the powdered sugar, milk, and vanilla extract until smooth. Add more milk if needed to reach your desired drizzling consistency.
Drizzle and Devour: Once the rolls are out of the oven, let them cool slightly before drizzling generously with the glaze. Serve warm and prepare for a blissful experience.