butternut squash layer cake

Ingredients For butternut squash layer cake

• 1/2 c

  butter
• 1 c

  brown sugar, firmly packed
• 1 c

  white sugar
• 2 c

  eggs
• 1 c

  cooked mashed squash
• 3 c

  cake flour
• 4 tsp

  baking powder
• 1/4 tsp

  baking soda
• 1 tsp

  cinnamon
• 1/4

  nutmeg
• 1/2 c

  milk
• 1 tsp

  vanilla extract
• 1 1/2 c

  packed brown sugar
• 3

  egg whites
• 6 tsp

  water
• 1/4 tsp

  cream of tartar
• 1 tsp

  vanilla extract