Begin by placing the frozen pumpkin purée in a microwave-safe dish. Warm it in the microwave on high for approximately 1 to 2 minutes until softened.
Add the milk to a blender, followed by the softened pumpkin purée, brown sugar, and ground cinnamon. Blend the mixture until smooth and well-combined.
Tips
For optimal freezing, transfer the pumpkin purée into a resealable bag, ensuring it’s stored in the freezer for a minimum of 24 hours. Homemade pumpkin purée works excellently in this recipe, though canned pumpkin purée will perform well as a substitute. If the pumpkin flavor is robust, add a frozen banana to mellow it. Feel free to explore flavor variations by incorporating vanilla extract or using a mix of pumpkin pie or apple pie spice.