cinnamon ripple sweet potato cake

Ingredients For cinnamon ripple sweet potato cake

• 1 c

  (2sticks) butter, softened, plus butter for pan
• 1/2 c

  brown sugar, firmly packed
• 1/2 c

  chopped pecans
• 1 tsp

  ground cinnamon
• 2 c

  sugar
• 3 lg

  eggs
• 12 oz

  sour cream
• 1 c

  mashed cooked sweet potato
• 1 tsp

  vanilla extract
• 3 c

  all purpose flour
• 1 tsp

  baking powder
• 1 tsp

  salt
• 1/4 tsp

  ground nutmeg
• 1 tsp

  ground cinnamon
• RUM GLAZE:
• 2 c

  confectioners' sugar
• 1/2 c

  heavy whipping cream
• 3/4 tsp

  rum extract
• pecans, for garnish
• in a small bowl, whisk together all of the ingredients until smooth.