1 stick unsalted butter
3/4 c. sugar
3 tbsp. flour
1 c. oatmeal
1 beaten egg
1 tsp. vanilla extract
1/4 tsp. baking powder

Preheat oven to 350°F.

Melt butter. Combine all other ingredients. When butter is cool, add to mixture and stir until combined. Line cookie sheet with foil or parchment paper. Drop 1/2 teaspoon dough onto lined sheet. Cookies will spread, so only put 3 to 4 on a line.

Bake 8 to 10 minutes. When brown around edges, take out of oven and cool. Peel foil off the cookies; don't use spatula. Be very gentle; cookies crumble easily.