Preheat Oven To 350 Deg F. Grease A 12" Pizza Pan. In A Medium Bowl With An Electric Mixer At Medium Speed, Mix Butter And Sugar Until Light And Fluffy. Beat In Egg. At Low Speeed Stir In Flour And Soda Until Well Blended. Evenly Spread The Mixture Into Prepared Pan. Bake At 20 Minutes Or Until Lightly Browned. Sprinkle With Marshmallows And Candies During Last 5 Minutes Of Baking. Cool On Wire Rack For 10 Minutes In The Pan. To Serve, Cut Into 16 Equal Sized Wedges. Each Wedge Equals 233 Calories, 3 g Protien, 11 g Fat, 32 mg Carbs, 112 mg Sodium. Recipe Is Ready To Serve In About 35 Minutes.