If you eat at home, breakfast is probably the cheapest meal. I usually eat oatmeal or eggs. Oatmeal is about $3 for a big tub of oats, so mere cents for a nice bowl, plus some fruit on top. Eggs are about $4 a dozen, so again, me scrambling two and putting them on toast is about a $2 breakfast.
If you want to cut back, you could try treating yourself twice a week and eating at home the other days. But if it's not a big problem, then keep enjoying your breakfast!