Brown Sugar-Pecan Cupcakes With Caramel Frosting

Ingredients

• nonstick vegetable oil spray
• 1 cup all purpose flour
• 1/2 cup cake flour
• 1/2 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon fine sea salt
• 1 1/4 cups coarsely chopped toasted pecans
• 1/2 cup (1 stick) unsalted butter, room temperature
• 1 cup (packed) golden brown sugar
• 2 large eggs, room temperature
• 1/3 cup sour cream
• 1 teaspoon vanilla extract
• 1 cup sugar
• 1/4 cup water
• 1/2 cup heavy whipping cream
• 2 large egg yolks
• 1/2 cup (1 stick) unsalted butter, room temperature
• 1/8 teaspoon fine sea salt
• 1 cup powdered sugar, sifted
• 1 cup coarsely chopped toasted pecans
• 12 paper muffin cup liners