Beat together eggs, orange juice, orange liqueur, 2 tbsp. Confectioners sugar and vanilla.Place bread slices in one layer in a large roasting or baking pan.Pour egg mixture over slices.Turn to soak.Place in refrigerator for at least 2 hours, turn bread slices occasionally.On a plate, combine confectioners sugar and brown sugar.Preheat electric skillet to 375 degrees.Melt butter and set aside.Remove bread slices from egg mixture.Place in skillet.Cook French Toast about 3 to 5 minutes on each side or until golden brown.Add more butter to skillet, if necessary.Toss slices in sugar mixture and serve immediately.Makes 4 to 6 servings.