Preheat oven to 350 degrees F (175 degrees C). Grease a 9-inch pie plate.
In a medium bowl, combine oats, flour, brown sugar, and 1/4 teaspoon salt. Stir in melted butter until evenly blended. Press mixture into prepared pie plate.
Bake in preheated oven for 12 minutes. Cool on a wire rack.
In a medium saucepan over medium heat, melt the chocolate chips, stirring constantly. Remove from heat, and cool slightly.
In a medium bowl, whisk together the granulated sugar, cornstarch, and 1/4 teaspoon salt. Gradually whisk in milk until smooth. Stir in butter and vanilla. Pour mixture into the saucepan with melted chocolate chips, stirring constantly.
Bring to a boil over medium heat. Reduce heat to low, and simmer until thick, about 8 minutes. Pour filling into cooled crust.
Refrigerate pie for at least 2 hours before serving.
Interesting Facts
Chocolate Oatmeal Pie is an old-fashioned dessert that is still popular today.
It is said to have originated in the late 1800s in the United States.
The oatmeal crust adds a unique texture to the creamy chocolate filling, making it a delightful treat.