01 -
Preheat oven to 375°F (190°C). Butter a 12-inch cast iron skillet or a medium casserole dish and set aside.
02 -
In a large bowl, whisk together mashed sweet potatoes, sugar, eggs, pumpkin pie spice, salt, and vanilla extract. Incorporate heavy cream until the mixture is smooth. Pour into the prepared skillet.
03 -
In a medium bowl, whisk together flour, sugar, cinnamon, and salt. Add melted butter and stir with a fork until crumbly. For a finer texture, you can use a hand mixer instead.
04 -
Spread the cinnamon streusel topping evenly over the sweet potato mixture. Bake until the filling is set and the top is golden brown, approximately 40 to 45 minutes.
05 -
Allow to cool for 10 minutes before serving. For optimal enjoyment, serve warm with a scoop of vanilla ice cream on top.