Butterscotch pie

4 tbls butter
1 cup brown sugar
1/3 cup flour
3 egg yolks
2 cups milk
2 tsp vanilla
.... And a mound of whipped cream


 in saucepan, Melt butter until a light brown.  Add brown sugar and flour, Mix untill well blended. In a small bowl blend milk,  egg yolks and vanilla. Add milk beaten eggs and vanilla. Add egg mixture a little at a time so The eggs dont currdle  Continue cooking until thick and bubbly. Pour into a pre-baked pie shell and cool. When ready to serve top with whipped cream.