All the energizing ingredients of a hiker's favorite snack—peanut butter, dried fruit, and a touch of chocolate—are blended into this flavorful muffin, which also features quinoa (pronounced KEEN-wah), a nutritious and increasingly popular grain. Besides packing in protein, the quinoa adds a little crunch to each bite. You can enjoy these muffins anytime, but if you bake and freeze a batch, you'll have a wholesome, hassle-free breakfast ready to go on hectic school mornings.
Fill a medium saucepan with water and bring it to a boil over high heat. Add the quinoa, reduce the heat to low, and simmer until the grains have popped open and appear translucent, about 12 minutes. Drain the grains in a fine mesh sieve and rinse them with cool water.
Did you know? Quinoa is popularly referred to and prepared as a cereal grain, but it belongs to the same plant family as beets, chard, and spinach.
In a large bowl with a hand mixer set at medium speed, beat together the brown sugar, peanut butter, and butter, scraping down the sides as needed, until smooth and creamy, about 5 minutes. Beat in the egg yolk and vanilla until smooth, then beat in the quinoa, continuing to scrape down the sides as you work. Reduce the mixer's speed to low and gradually beat in the milk.
In a large bowl with a mixer set at high speed and beaters that have been cleaned and dried (to ensure that the eggs whip), beat the egg whites until soft peaks form, about 1 minute. Use a rubber spatula to gently fold the egg whites into the batter.
With a large spoon or ice cream scoop, fill each well of the muffin tin three- quarters full with batter.