Preheat your oven to 375°F and grease a 12-inch cast iron skillet or a 9×9 casserole dish.
Make the Pumpkin Pie Layer: Mix pumpkin puree, sugar, eggs, pumpkin pie spice, salt, and vanilla extract until smooth. Add heavy cream and stir until well combined. Pour this into your prepared dish.
Create the Cinnamon Streusel Layer: Combine flour, oats, brown sugar, cinnamon, and nutmeg. Add cold cubed butter and mix until crumbly. You can use a fork or a hand mixer for this.
Sprinkle the cinnamon streusel topping evenly over the pumpkin pie layer.
Bake for 40-45 minutes until the filling sets and the top turns golden brown.
Let your Pumpkin Crisp cool for about 10 minutes to allow the pie layer to firm up slightly before serving..
Notes
Feel free to add nuts (pecans or walnuts) to the streusel topping.
Can be eaten warm or cold.
Serve as is or with vanilla ice cream, whipped cream, or cool whip.