Preheat oven to 350 degrees F. Cream the butter, sugars, eggs, and vanilla with an electric mixer on medium speed. Add the dry ingredients and mix. Stir in the oats and the gumdrops. Drop by tablespoons full, about 2” apart, onto a parchment-covered cookie sheet. Bake for about 11 minutes, watching to see that they don’t brown too much. Cool (on the pan) for 2 minutes; then remove to a wire rack to finish cooling.
Store in an airtight container.