I started out intending to make a lower-fat, lower-sugar version of "Lemon Raspberry Muffins" by Recipezaar (#6967), but realized in the midst of making them that I didn't have any lemons nor lemon extract. *sigh* I did have an orange, though, so here's the "accidental" muffin I came up with to salvage my bowl of dry ingredients. You can obviously use sugar in place of the splenda, and full-fat versions of other ingredients (whole eggs, more oil, whole milk yogurt), but they taste awesome as is!