Heat the oven to 375°F. Lightly grease a 24-cup mini muffin pan with cooking spray.
Unroll the dough on a lightly floured surface. If you’re using crescent rolls, pinch the seams together to make one sheet. Cut it into 24 squares (4 rows by 6).
Press one square into each muffin cup.
Place a piece of brie in each cup. Top with about 1 teaspoon of cranberry sauce and a few pecans.
Bake for 12–15 minutes, until the dough is golden brown.
Cool in the pan for 5 minutes, then lift the bites out. Garnish with a little fresh rosemary and serve warm.