Sour Cream Pumpkin Coffeecake - I Ate The 80's

Ingredients

• ½ cup butter
• ¾ cup sugar
• 1 tsp vanilla
• 3 eggs
• 2 cups flour
• 1 tsp baking powder
• 1 tsp baking soda
• 1 cup sour cream
• 1 ¾ cups (16 oz can) pumpkin
• 1 slightly beaten egg
• ⅓ cup sugar
• 1 tsp pumpkin pie spice
• 1 cup firmly packed brown sugar
• ⅓ cup butter
• 2 tsp cinnamon