Coffee Streusel Muffins



  1. MIX all the crumb topping ingredients together until it forms coarse crumbs. Set aside.
  2. COMBINE together the flour, brown sugar, baking powder, baking soda, cinnamon, and salt in a large bowl. 
  3. WHISK the sour cream, butter, egg, and vanilla together in a separate bowl until well combined.
  4. MIX the wet ingredients into the dry until well combined.
  5. SELECT Preheat on the Cosori Air Fryer, adjust to 350°F, and press Start/Pause.
  6. GREASE muffin cups with cooking spray and pour batter in until cups are ¾ full.
  7. SPRINKLE the top of the muffins with the crumb topping.
  8. PLACE the muffins into the preheated air fryer. You may need to work in batches.
  9. COOK the muffins at 350°F for 12 minutes.