Preheat the oven to 350F
Line a 12 muffin pan with 12 muffin papers. Pro-tip: grease the inside of the muffin liners with spray oil. Set it aside.
Mix oat milk, canola oil, apple cider vinegar, and vanilla extract in a large bowl. Whisk to combine.
Add sugar and mix to incorporate.
In a separate bowl, whisk together the flour, salt and baking powder.
Add the dry ingredients to the wet ingredients and stir just to combine. DO NOT OVERMIX
Fold ⅔ of the chocolate chips or chunks in to the batter, reserving the other ⅓
Divide the batter in to the 12 prepared muffin liners. Sprinkle the remaining chocolate chips on top.
Bake for 25-30 minutes or until an inserted toothpick comes out clean
Remove pan to a wire cooling rack and let the muffins cool in the pan for 10 minutes