INGREDIENTS
1/2 cup
unsalted butter, softened to room temperature
3/4 cup
dark brown sugar, packed
1/4 cup
(50g) granulated sugar
1
large egg
2 tsp
vanilla extract
1
and 2/3 cups (140g) old-fashioned rolled oats
1 cup
all-purpose flour
1/2 tsp
ground cinnamon
1/2 tsp
baking soda
1/4 tsp
salt
1 cup
mini M&Ms (or regular size)