Recipes and Cooking Stacked Bison Burgers with Caramelized Onions and Spicy Mayo Be the first to rate & review! Getting the gang excited about going paleo will be easy with this take on the classic burger. By BHG Test Kitchen BHG Test Kitchen The Better Homes & Gardens Test Kitchen has been in continuous operation for nearly 100 years, developing and testing practical, reliable recipes that readers can enjoy at home. The Test Kitchen team includes culinary specialists, food stylists, registered and licensed nutritionists, and other experts with Bachelor of Science degrees in food science, food and nutrition, or culinary arts. Together, the team tests more than 2,500 recipes, produces more than 2,500 food images, and creates more than 1,000 food videos each year in the state-of-the-art test kitchen. Learn about BHG's Editorial Process Updated on January 12, 2022 Print Rate It Share Share Tweet Pin Email Prep Time: 45 mins Grill Time: 13 mins Total Time: 45 mins Servings: 4 Yield: 4 burger stacks Jump to Nutrition Facts Ingredients 1 egg, lightly beaten 2 tablespoon olive oil 2 teaspoon salt-free all-purpose seasoning* ¼ teaspoon sea salt 1 ½ pound ground bison (buffalo) or ground beef 4 large tomato slices ¼ cup Spicy Paleo Mayonnaise 1 recipe Caramelized Onions ⅓ cup thinly sliced fresh basil Caramelized Onions 1 tablespoon olive oil 1 large sweet onion (such as Vidalia or Walla Walla), halved lengthwise and thinly sliced ¼ teaspoon kosher salt ¼ teaspoon freshly ground black pepper Directions In a large bowl combine first four ingredients (through salt). Add ground bison; mix well. Shape into four 3/4-inch-thick patties; lightly press centers to make dimples. Grill patties, covered, over medium heat 13 to 15 minutes or until done (160°F), turning once. To serve, stack tomatoes and burgers. Top with Spicy Paleo Mayonnaise, Caramelized Onions, and basil. Caramelized Onions In a large skillet, heat oil over medium-low heat. Add onion, salt and pepper. Cook, covered, for 13 to 15 minutes or until onions are tender, stirring occasionally. Uncover; cook and stir over medium-high heat for 3 to 5 minutes more or until golden. *Tip Look for an all-purpose seasoning blend that does not have any added preservatives or fillers. McCormick Perfect Pinch is a good option. Rate it Print Nutrition Facts (per serving) 533 Calories 39g Fat 9g Carbs 33g Protein Show Full Nutrition Label Hide Full Nutrition Label Nutrition Facts Servings Per Recipe 4 Calories 533 % Daily Value * Total Fat 39g 50% Saturated Fat 9g 45% Cholesterol 131mg 44% Sodium 447mg 19% Total Carbohydrate 9g 3% Total Sugars 4g Protein 33g Vitamin C 11.6mg 58% Calcium 39mg 3% Iron 12.9mg 72% Potassium 251mg 5% Folate, total 29.9mcg Vitamin B-12 4.6mcg Vitamin B-6 0.2mg *The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.