*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
**Nutrient information is not available for all ingredients. Amount is based on available nutrient data.
(-)Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.
Stir oats, milk chocolate pieces, flour, flax seed meal, brown sugar, and salt together in a large bowl. Make a well in the center of the oat mixture.
Whisk egg in a separate bowl until light and fluffy. Add honey, oil, and vanilla; whisk until well-combined. Pour egg mixture into the well in the oat mixture. Stir until evenly combined. Pour mixture into a 9x13-inch glass baking dish; pat down and spread the mixture flat, leaving at least 1-inch of space between the mixture and the sides of the dish.
Bake in the preheated oven until golden and set, about 25 minutes.
These can also be made gluten-free by substituting gluten-free flour and 1/4 teaspoon xanthan gum for the all-purpose flour. You can also replace the egg with an egg substitute, and the vegetable oil with canola oil.