Preheat oven 350 degrees F.

Spray muffin tin with non-stick cooking spray.

Mix cake mix, orange juice, oil and eggs until well combined.

In a small saucepan stir butter and brown sugar over medium heat and cook until butter melts. (about 3 minutes)

Spoon 2 teaspoons of butter mixture into each muffin tin.

Add a layer of cranberries and then fill each cup 2/3 full with cake batter.

Bake 20-25 minutes.

Cool for 5 minutes and then take knife around cake edges of each cup.

Invert on to a baking sheet.