Preheat oven to 350°F. Line a muffin pan with liners (you will only need 10 out of the 12).
Add all ingredients except chocolate chips. Whisk until smooth batter forms. (You can also mix in a blender.) Stir in chocolate chips. If desired, reserve some of the chocolate chips to be sprinkled on top of the batter.
Using a large ice cream scoop, scoop batter into muffin pan, filling the liners about 3/4 full. Sprinkle remaining chocolate chips on top. Bake muffins for about 18-22 minutes. The top of the muffins should puff up and a toothpick inserted should only have a few crumbs clinging. Don't worry if the tops of the muffins sink slightly as they cool. Let muffins cool completely before removing from pan and eating.
Notes
The tops of the muffins may deflate slightly, this is normal since the muffins don't have flour. The best way to check if muffins are done is by inserting a toothpick.
I use natural creamy almond butter (the kind that needs to be stirred). While you can use almond butter processed with oils, it will be much thicker and harder to stir.
You can substitute almond butter with other nut butters. I have not tested this with sunflower butter.
The chocolate chips are completely optional. They taste great without them too.
I use Lily's semi-sweet baking chips.* The muffins in the photos use Lily's dark chocolate chips, but I have since modified the recipe because the semi-sweet or milk chocolate chips pair better with the pumpkin batter (the dark chocolate is a little too bitter).
*This product link is an affiliate link. This means I earn a small commission from qualifying purchases (at no extra charge to you).
Nutrition estimate does not include chocolate chips. The estimated carbohydrates count excludes sugar alcohols. The net carbs exclude both fiber and sugar alcohols.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.