* I use an electric hand mixer, however I like to use a silicone spatula to mix the brown sugar in beforehand so it doesn't fly everywhere since it's a pretty strong mixer. You can whisk by hand if you don't have a hand mixer, or use a stand mixer if you have one. I like to use the hand mixer in one hand and in the other hand use the silicone spatula to scrape down the sides as I'm mixing.