1. In a large bowl mix together pumpkin pie layer ingredients.
2. Butter a casserole dish, pour in the pumpkin mixture, and set aside.
3. In a medium sized bowl mix together streusel ingredients with a fork until combined and crumbly. Sprinkle over pumpkin pie layer.
4. Bake for 45 minutes on 375°F.
5. Let cool for 10 minutes before digging in.
6. Serve with ice cream and caramel sauce.
