This recipe is from Indiana & Michigan Electric Company and found in a large collection, date unknown. I’ve typed it below along with a scanned copy.

Blender Pumpkin Pie

2 envelopes unflavored gelatin
1/2 cup milk, heated to boiling
1/2 cup cold milk
3/4 cup firmly packed brown sugar
2 cups canned pumpkin
1/2 teaspoon salt
1 teaspoon cinnamon
3/4 teaspoon nutmeg
1/4 teaspoon ginger
1/2 cup heavy cream
1 cup ice cubes
1 graham cracker crust

Sprinkle gelatin over cold milk in blender container. Allow to stand while assembling other ingredients. Add boiling milk. Cover and process at low speed until gelatin dissolves. Use a rubber spatula if granules cling to side of container. Add brown sugar, pumpkin, salt, spices and cream. Cover and process at high speed. Add ice cubes one at a time. Process until mixture is smooth and ice is melted.

Chill about 5 minutes. Pour in prepared crust and chill until serving time. (Keeps well, refrigerated, for several days.)