Streusel Topping

• 3 tablespoons all-purpose flour
• 1 ½ tablespoons unsalted butter, cold and cut into cubes
• 1 ½ tablespoons light brown sugar
• 2 teaspoons granulated sugar
• pinch salt
• 1/4 teaspoon ground cinnamon (or pumpkin pie spice)
• 1 ½ tablespoons diced apples (reserved from below)

Apple Pumpkin Muffins

• 1 ½ tablespoons full fat sour cream, room temperature
• 5 tablespoons pure canned pumpkin
• 1 tablespoon apple juice (or orange juice or water)
• 3 tablespoons granulated sugar
• 2 tablespoons light brown sugar
• 1 large egg yolk, room temperature
• 1/2 teaspoon vanilla extract
• 1/2 cup fresh apple, cut into small cubes (I use Honeycrisp; Dice about 1 ½ tablespoons smaller for the streusel)
• 1/2 cup, plus 1 tablespoon all-purpose flour
• 1/4 teaspoon baking soda
• 1/8 teaspoon salt
• 3/4 teaspoon pumpkin pie spice