# What You'll Need:
→ Muffins
01 - 2 cups all-purpose flour
02 - 1/2 cup granulated sugar
03 - 1/4 cup packed light brown sugar
04 - 2 teaspoons baking powder
05 - 1/2 teaspoon baking soda
06 - 1/2 teaspoon salt
07 - 1 1/2 teaspoons ground cinnamon
08 - 2 large eggs
09 - 1/2 cup vegetable oil
10 - 1/2 cup plain Greek yogurt
11 - 1/4 cup milk
12 - 1 teaspoon vanilla extract
13 - 2 cups peeled, cored, and finely diced apples (about 2 medium)
→ Crumb Topping
14 - 1/2 cup all-purpose flour
15 - 1/3 cup packed light brown sugar
16 - 1/2 teaspoon ground cinnamon
17 - 1/4 cup unsalted butter, melted
18 - Pinch of salt
# Step-by-Step Guide:
01 - Preheat oven to 375°F. Line a 12-cup muffin tin with paper liners or grease lightly.
02 - In a large bowl, whisk together flour, granulated sugar, brown sugar, baking powder, baking soda, salt, and cinnamon.
03 - In a separate bowl, whisk eggs, vegetable oil, Greek yogurt, milk, and vanilla extract until smooth.
04 - Gently fold wet ingredients into dry ingredients until just combined; avoid overmixing.
05 - Fold in the diced apples evenly throughout the batter.
06 - Divide the batter equally among muffin cups, filling each to three-fourths full.
07 - Mix flour, brown sugar, cinnamon, and salt in a small bowl. Stir in melted butter until clumps form.
08 - Sprinkle crumb topping evenly over each filled muffin cup.
09 - Bake for 20 to 22 minutes, or until a toothpick inserted in the center comes out clean.
10 - Allow muffins to cool in the pan for 5 minutes before transferring to a wire rack to cool completely.
