In saucepan, melt butter, gradually stir in flour. Allow buter-flour mixture to cook for a few minutes. Slowly stir in milk and cook until thickened. Reduce heat and stir in rated cheese. When cheese is melted, add 3 beaten egg yolks, salt and paprika. Cook and stir for 1 minute. Cool. Whip egg whites until fairly stiff, fold into cheese mixture. Place souffle in an un ungreased 7 inch pan, in a 325° oven. After 10 minutes increase heat to 350°. Bake until firm, about 30 minutes.