In a double boiler, melt butter. Slice fresh jalapeno and add to the melted butter. Remove from heat, let sit for 5 minutes. Remove jalapenos, reserving for later if you wish. Return pan, bringing heat back up to medium-high. Toss in flour and mix. Add in half of your milk, followed by half of your cheese. Let the cheese sit for a minute, allowing it to begin melting. Stir to combine ingredients. Add in remaining milk and cheese. Stir until you have a smooth and creamy cheese mixture. Toss in all of your spices, stir well.