# 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
→ 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
# Method:
01 - Preheat oven to 375°F and line a 12-cup muffin tin with paper liners or lightly grease.
02 - Whisk together flour, granulated sugar, brown sugar, baking powder, baking soda, salt, and cinnamon in a large bowl.
03 - In a separate bowl, whisk eggs, vegetable oil, Greek yogurt, milk, and vanilla extract until smooth.
04 - Pour wet ingredients into dry ingredients and gently mix until just combined; avoid overmixing.
05 - Fold finely diced apples into the batter evenly.
06 - Divide batter evenly among muffin cups, filling each about three-quarters full.
07 - Combine flour, brown sugar, cinnamon, and salt in a small bowl. Stir in melted butter until crumbly clusters form.
08 - Sprinkle crumb topping evenly over each muffin, then bake for 20 to 22 minutes until a toothpick inserted in the center comes out clean.
09 - Allow muffins to cool in the pan for 5 minutes before transferring to a wire rack to cool completely.
