Caramel-Apple Walnut Cake

Ingredients

• For the Topping
• 1/2 cup walnuts
• 1 pinch salt
• 1/3 cup caramel (either cut from a block or about 12 to 15 unwrapped candies)
• 3 tablespoons heavy cream or 3 tablespoons whole milk
• For the Cake
• 1 cup sugar
• 1/2 cup butter
• 1/2 teaspoon ground cinnamon
• 1 3/4 teaspoons baking powder
• 1/2 teaspoon salt
• 1 teaspoon vanilla extract
• 2 large eggs
• 1/2 cup sour cream or 1/2 cup yogurt
• 2 cups king arthur unbleached all-purpose flour
• For the Filling
• 2 large apples, peeled, cored, cut into 8 wedges each
• 2 tablespoons sugar
• 1 teaspoon vanilla extract