For those days when you're feeling a little cheesy, this Oktoberfest Fondue is just right! Step 1: Heat beer and vinegar to simmering for 25-30 minutes. 2: Shred cheeses for 2 cups Gruyére and 1 1/2 cups Cheddar. 3: With whisk gradually stir cream cheese into beer mixture; stir in cheeses. To remove lumps, blend with blender, hand blender, or strain through fine-mesh strain. Transfer to fondue pot to serve.