Grandma's Pumpkin Pie

This is my husband's Grandma Elsie's recipe.  It's the family favorite.  

1/4 stick butter melted
1/2 cup white sugar
1/2 cup brown sugar
2 tablespoons flour
3 eggs
1 3/4 cup pumpkin (fresh or use 1 can)
1 teaspoon salt
1 teaspoon cinnamon ( I use a little more)
1/4 teaspoon nutmeg
1/4 teaspoon allspice
1 1/2 cups milk

Mix ingredients.  Turn into pie shell and cook at 400 degrees for 15 minutes.  Reduce oven to 375 degrees 
and cook for 45 minutes.