Prep: Preheat oven to 425°Line a 12 cup muffin pan and grease the liners.
Make muffin batter: Mix dry ingredients in a large bowl. Mix wet ingredients in a separate medium bowl. Add wet to dry ingredients and mix JUST until combined - do not overmix, some lumps are OFold in the chocolate chips.
Bake: Evenly divide muffin batter between prepared muffin cups (I use a cookie scoop! so easy). Reduce oven heat to 400°F and bake the muffins for 5 minutes. WITHOUT OPENING THE OVEN, reduce oven heat to 360°F and finish baking the muffins for 10-15 minutes, or until a toothpick inserted comes out clean. Cool in the pan for 5 minutes, then remove to a rack to cool completely.