- 1 tablespoon butter
- 2 eggs
- 1 cup white sugar
- 3 tablespoons all-purpose flour
- 3 cups diced rhubarb
- 1 (9 inch) prepared 9-inch single pie crust
- Preheat oven to 350 degrees F (175 degrees C).
- Heat butter in microwave oven in a 4-cup microwave-safe measuring cup until melted but not hot, about 1 minute. Beat eggs, sugar, and flour into butter with a fork until smooth. Spread the rhubarb into the unbaked pie crust and pour the liquid ingredients over the rhubarb.
- Bake pie in the preheated oven until the filling is lightly browned, about 45 minutes.