Brenda Cowley's Texas Pimento Cheese

3 cups grated cheddar cheese
1  1/2 cups of grated Monterrey Jack cheese
1/2 cup chopped pimentos
2 Tbls. chopped pickled jalapenos with juice
1 cup of Mayonnaise
1 cup Miracle Whip

This is best when made with block cheese that has been grated using a food processor or with a hand grater.  You can use shredded cheese in bags, but I think the fresh grated tastes better.  

Make sure you use regular mayonnaise and Miracle Whip, not the light or fat free versions.  It will not taste good. 
You may add more jalapenos and pimentos to your taste.  This makes a lot of cheese. I have divided this in half, leaving one container plain (without jalapenos)  for my "non-spicy" friends.