rainbow blondies

Ingredients For rainbow blondies

• 1/2 c

  butter, softened
• 1/2 c

  butter-flavored shortening
• 1 c

  light brown sugar, packed
• 1/2 c

  granulated sugar
• 2

  eggs
• 1 tsp

  vanilla extract
• 1/2 tsp

  baking soda
• 1/2 tsp

  kosher salt
• 2 1/2 c

  flour
• 1/3 c

  sour cream
• 1

  full bag of m & m's candy
• 1 c

  macadamia nuts, chopped