Preheat the oven to 350F and line a muffin tray with muffin cups.
Add all ingredients except chocolate chips into a mixing bowl and mix until well combined.
Stir in the chocolate chips.
Transfer batter to the lined muffin pan, filling the holes 3/4 of the way up.
Bake on the centre rack of the preheated oven for 20 to 22 minutes, or until muffins are puffy and cooked through.