Preheat oven to 375°F degrees. Spray a mini muffin tin with cooking spray. Spread a little flour out onto your counter. Then roll out crescent dough sheet. If using crescent rolls, pinch the seams together to make one long sheet.
Cut crescent roll dough into 24 equal-sized squares. Place squares into muffin tin slots.
Cut brie into small pieces and place inside the crescent dough squares. Top with a generous spoonful of cranberry sauce, and a little sprig of rosemary.
Bake until the crescent dough is a light golden brown (about 15 minutes). Then serve warm!
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Notes
Note: Some folks like to cut off the rind to the brie. This isn't necessary with brie but feel free to remove that additional rind.