Cinnamon Roll Muffins

1. preheat oven to 425F
2. Start by creating the muffin batter by mixing together the wet ingredients including melted butter, sugar, egg, vanilla, yogurt and milk
3. Then add in all the dry ingredients 
4. Mix until a smooth batter forms 
5. In a separate bowl make the cinnamon swirl filling 
6. Place the batter into muffin liners
7. Swirl the cinnamon filling into the muffin batter 
8. Mix together the crumble ingredients and add it on top of the muffins
9. Bake for 5 minutes at 425F then lower oven to 350F and bake for 20 minutes 
10. Let it cool down and enjoy!!