This is somewhat adapted from
The Enchanted Broccoli Forest by Mollie Katzen. The muffins are not sweet, so they are an antidote to the overly-sticky Costco muffins. I use an extra-large muffin tin that makes six instead of twelve.
Preheat oven to 350.
1 cup rolled oats (not instant)
3/4 cup minced walnuts (or pecans)
Toast oats & nuts in a dry skillet over medium heat for ten minutes, stirring frequently. (Do not skip this step.)
Combine in bowl
1 cup white flour
1/2 cup whole wheat flour
1/2 tsp baking soda
1 1/2 tsp baking powder
1/2 tsp salt
Add toasted oats & nuts to flour mixture.
Melt together
3 tablespoons butter
3 tablespoons honey
Add melted butter-honey to flour-oat mixture, along with one cup milk or buttermilk and one slightly beaten egg. Mix just enough to combine all ingredients; do not beat. Spoon into greased muffin tin. If using a tin that makes 12 regular-sized muffins, bake 20-25 minutes. If making six large muffins, this only takes about 12-15 minutes (weird but true).
I actually like these plain without any butter, but they would be good with butter, honey, or jam.