Grandma’s Apple Crumb Cake – Brownie Mischief

Ingredients

• 1 tablespoon (14g) butter
• 3 cups (340g) chopped apples (1/2-inch pieces) (Use any combination of your favorite baking apples.)
• 2 tablespoons (25g) sugar
• 1/2 teaspoon ground cinnamon
• 1 cup (128g) all purpose flour
• 1/3 cup (67g) brown sugar
• 3 tablespoons (38g) sugar
• 1/4 teaspoon ground cinnamon
• Scant 1/4 teaspoon fine sea salt
• 6 tablespoons (85g) cold, unsalted butter, cubed
• 1 2/3 cups (213g) all purpose flour, sifted
• 2 teaspoons baking powder
• 1/2 teaspoon fine sea salt
• 1/2 cup (113g) unsalted butter, softened
• 1 cup (200g) sugar
• 2 large eggs, room temperature
• 1 1/2 teaspoons pure vanilla extract
• 1/2 cup (118ml) whole milk, room temperature
• 1/3 cup (75g) sour cream, room temperature
• 2 cups (234g) powdered sugar, sifted
• 2 tablespoons (28g) unsalted butter, melted
• 1/2 teaspoon vanilla bean paste or pure vanilla extract
• 1 pinch fine sea salt
• 3-4 tablespoons (45-60ml) half & half cream, room temperature