|light brown Muscovado sugar, or|
Food Processor Method In a food processor, pulse together the brown sugar, granulated sugar, oats, and salt until well combined. Add the flour, butter, and vanilla and pulse until the mixture is coarse and crumbly. Empty the mixture into a small bowl and, with your fingertips, lightly pinch it together to form little clumps.
Electric Mixer Method In the bowl of a stand mix