Combine butter, brown sugar, corn syrup and vanilla together. Divide mixture equally between 12 sprayed muffin cups. Divide macadamia nuts equally and sprinkle over butter mixture in each muffin cup.
Place one roll on top of nuts in each muffin cup. Cover with sprayed plastic wrap and let rise until almost double in size.
Remove plastic wrap and place muffin tin on a baking pan to catch possible dripping. Bake at 350°F 20 minutes or until golden brown. Remove from oven and invert onto serving platter.