Preheat oven to 350°F.
Spray a loaf pan with non-stick spray.
Add ice cream to a large mixing bowl and stir until smooth and melted.
Stir in flour until just combined.
Pour the mixture into the greased loaf pan.
Top with rainbow sprinkles.
Bake for 40 minutes or until a toothpick inserted in the center comes out clean.
Cool then slice and serve.