I have this basic muffin recipe, but I altered it so it would be much lower in the glucose load department. try adding half of the flour as almond flour, and use 2 eggs instead of one, use coconut in place of butter, as coconut oil is supposed to be really good for blood sugar control. then I add either chocolate chips the dark kind which is low in sugar or use fresh blueberries, which I did today. yummy.
here is a link for the basic muffin recipe.