Substitute ¼ teaspoon of stevia or other favorite low carb sweetener for the maple syrup for even lower carb.
Leave out the chocolate chips if desired.
Store in an airtight container in the refrigerator. I always like to warm them for a few seconds in the microwave before eating. (It's my thing.) These muffins freeze great as well.
If muffins stick to tins, use a butter knife and run it along the sides of each muffin to help remove them easier.