Caramel Walnut Upside Down Banana Cake | Serving From Home

Ingredients

• 1/2 cp unsalted butter
• 1 cp packed brown sugar
• 3 tbsp corn syrup
• 3/4 cp walnut halves
• 1 3/4 cp cake and pastry flour
• 1 tsp baking powder
• 3/4 tsp baking soda
• 1/2 tsp salt
• 1/2 cp unsalted butter, room temp
• 1/2 cp sugar, 1/2 cp packed brown sugar
• 2 large eggs
• 1 cp ripe mashed bananas (2-3)
• 3 tbsp sour cream
• 1 tsp rum flavour
• 1 tsp vanilla