1 Cup sour cream* 
1 cup mayonnaise* 
1/2 cup yellow mustard 
1/4 cup sugar (may sub 10 packets substitute sugar) 
3 tablespoons horseradish 
1/2 cup grated onion 
1 package Hidden Valley Ranch dressing 

Mix all ingredients together. Great with pretzels, chips or vegetables. 

* May use lite or non fat variety