1 sheet thawed puff pastry (thaw in fridge overnight or thaw at room temp for 30 minutes)
Preheat oven to 400 degrees. Unroll puff pastry onto lightly floured work surface. Roll out an additional 2 inches lengthwise. This will give you more layers of gooey goodness! Brush 3 T of the melted butter over top of pastry. Sprinkle with cinnamon/sugar mixture. Roll tightly from small edge to opposite small edge (like a jelly roll). Cut into 8 equal pieces. Spray muffin tin with non-stick cooking spray. Place each roll in tin with the layers upright. Brush the remaining 1 T butter over top of rolls. Bake for 20 minutes until golden brown on top and puffed up slightly.
While rolls are baking, you can make the vanilla icing.
1 cup powdered sugar
1 tsp vanilla extract
Combine powdered sugar and vanilla extract in bowl. Stir to see how much milk you will need to make a slightly thick icing. Add enough milk and stir, add more milk or powdered sugar until perfect consistency. Set aside and wait on the rolls to bake.
Remove rolls from oven. Use a fork to remove from muffin tin and place on a large plate. Drizzle generously with vanilla icing. This makes a lot of icing so use as much or as little as you like. Enjoy!