In a medium bowl, sift the flour, cinnamon, ginger, nutmeg, baking powder, baking soda, and salt. Set aside.
2 1/4 cups All-purpose flour, 2 tsp Ground cinnamon, 1/2 tsp Ground ginger, 1/4 tsp Ground nutmeg, 2 tsp Baking powder, 1/2 tsp Baking soda, 1/2 tsp Salt
In a large bowl, add oil, brown sugar, vanilla, eggs, apple sauce, and milk. Mix with a whisk.
1/2 cup Oil, 3/4 cup Brown sugar, 1 tsp Pure vanilla extract, 2 Large eggs, 1/2 cup Unsweetened apple sauce, 1/2 cup Milk
Add the dry ingredients and mix with a baking rubber spatula until just combined. Add the diced apples and fold it in lightly.
Preheat the oven to 425℉. Line two 12 cup muffin pans with muffin liners. Fill every other hole. Let the muffin batter rest for 10 minutes, it helps with a higher rise.
Use a large cookie scoop to scoop the muffin batter into the liners. Fill it all the way to the top. Take the crumb topping out of the fridge and use your hands to crumble it on top of the batter.
Bake for 5 minutes at 425. Reduce the heat to 350℉. Bake for another 10-13 minutes until a toothpick inserted comes out clean.
Let the muffins sit in the hot pan for 10 minutes, before placing on a wire rack to cool completely.