Step 1

Preheat the oven to 350 degrees Fahrenheit.

Step 2

Stir together 1 1/2 cups sugar and cornstarch in a large saucepan.

Step 3

Add the butter and heavy cream and cook over medium heat. Stir constantly until the mixture is thickened and starts to boil, about 10-15 minutes.

Step 4

Remove from heat and stir in vanilla.

Step 5

Pour filling into the pie crust, smoothing the top with a spatula.

Step 6

Prepare the topping: mix 1/4 cup sugar with cinnamon.

Step 7

Brush melted butter over the pie and sprinkle with the cinnamon-sugar mixture.

Step 8

Bake for about 25-30 minutes, or until the filling is set and the top is lightly golden.

Step 9

Remove pie from the oven and cool completely. The pie will set more as it cools.

Step 10

Refrigerate until ready to serve.

Step 11

Serve and enjoy!