Upsidedown Hazelnut Banana Cake Recipe | Food Network

Ingredients

• 1/3 pound hazelnuts
• 1 cup sugar
• 8 tablespoons unsalted butter (1 stick)
• 2 eggs
• 1 cup sour cream
• 2 teaspoons vanilla extract
• 1/2 cup banana puree, from 1 or 2 bananas
• 1 3/4 cups all-purpose flour
• 2 teaspoons baking powder
• 1 teaspoon salt
• Hazelnut schmear, recipe follows
• Whole bananas
• 3/4 cup butter
• 1/2 pound dark brown sugar
• 1/2 cup chopped toasted hazelnuts