- Crust:
- 1 (4.8 ounce) package graham crackers, crushed, or as needed
- 1/2 cup melted butter
- Filling:
- 2 eggs, beaten
- 1/4 cup white sugar, or to taste
- 3 tablespoons cornstarch
- 3 tablespoons cake flour
- 2 cups milk
- 1 cinnamon stick
- 2 tablespoons butter
- 1/2 teaspoon vanilla extract
- 1 tablespoon cinnamon sugar, or to taste
- Stir graham cracker crumbs and melted butter together in a bowl; press firmly into a pie dish.
- Beat eggs and white sugar together in a bowl; mix in cornstarch and cake flour.
- Heat milk and cinnamon stick together in a saucepan until just under the boiling point, 5 to 10 minutes. Pour milk mixture into egg mixture, whisking constantly. Pour milk-egg mixture back into saucepan.
- Cook milk-egg mixture over medium heat, whisking constantly, until mixture thickens, 5 to 10 minutes. Remove from heat and stir in 2 tablespoons butter and vanilla extract until completely incorporated.
- Pour milk mixture into prepared crust and sprinkle with cinnamon sugar.