1 tablespoon sour cream
1 (1 ounce) package ranch dressing mix (such as Hidden Valley Ranch)
1 (8 ounce) package cream cheese
1/2 pound Cheddar cheese, shredded
1/4 cup finely chopped pecans
Mix the sour cream with ranch dressing mix in a bowl until smoothly combined. Add the cream cheese and Cheddar cheese to the bowl, and mix together with your hands until thoroughly blended. Chill the mixture for 5 minutes, then shape into a ball.
Place the pecans into a shallow bowl, and roll all sides of the cheese ball in the pecans to coat. Serve immediately.