All the sizzling peppers, sweet onions, warm Mexican spices and a creamy scoop of guacamole — everything you love about fajitas — transformed into one irresistible burger. Make-ahead options make this an easy, impressive weeknight or weekend meal.

This Recipe: • Includes Make-Ahead Steps •

Dig in with a knife, a fork and a stack of napkins — these burgers are meant to be enjoyed with abandon. They combine the bold, smoky flavors of fajita-seasoned vegetables with juicy, well-spiced beef and a cool, creamy guacamole topping.

This is a burger that delivers all the satisfying, grill-charred flavors you crave: caramelized onions, tender bell and poblano peppers, and beef seasoned with chili, cumin, garlic and onion powders. Everything comes together on a hearty whole grain bun and finishes with a generous spoonful of chunky, fresh guacamole.

Although this burger feels indulgent and over-the-top, the recipe is built with balanced choices in mind. Using extra-lean ground beef keeps the patties flavorful while limiting excess fat. A robust spice blend provides deep savory notes and antioxidant-rich ingredients, and the roasted vegetables add natural sweetness, fiber and color.

Instead of piling on cheese or conventional condiments high in added sugar, these burgers are finished with guacamole — a creamy, nutrient-rich alternative. Avocado brings healthy fats and a silky texture that pairs beautifully with the smoky vegetables and spiced beef.

These burgers are also versatile. You can grill the vegetables and patties together, or prepare the spiced vegetables and raw patties ahead of time and refrigerate them separately until you’re ready to cook. If you prefer, make the guacamole shortly before serving to keep it bright and fresh; or press plastic wrap directly onto its surface if you must prepare it a bit earlier to avoid surface browning.

When grilling, keep a few details in mind: cut the onion into planks so the rings stay together and cook evenly; place thicker onion planks over a hotter spot if needed; and move thinner poblano pieces to a slightly cooler area so they don’t char too quickly. For the patties, form them gently and make a shallow divot in the center to help them cook flat instead of doming up.

To serve, load each whole grain bun with a hot burger, pile on the grilled peppers and onions, then add a generous spoonful of guacamole. These are best eaten right away while the vegetables still have a charred edge and the patties are juicy. Give guests plenty of napkins — this is a full-flavored, hands-on meal meant to be enjoyed without restraint.

Whether you’re cooking for a casual family dinner or feeding a hungry group at a backyard barbecue, these fajita burgers are an easy way to deliver big flavor, bright colors and a satisfying texture contrast. The make-ahead tips help keep dinner simple and stress-free, while the final assembly keeps the topping fresh and vibrant.

The result is a memorable burger experience: bold, smoky, fresh and creamy all at once. Enjoy — and don’t be surprised if these become a regular request at your table.

Easy Grilled Fajita Burgers with Guacamole

Yield:
4

Prep Time:
25 minutes

Cook Time:
13 minutes

Total Time:
38 minutes

Mexican toppings and creamy guacamole highlight these deliciously satisfying Fajita Burgers!

•  Includes Make-Ahead Steps  •

Ingredients

Spice Mixture:

• 1 tablespoon chili powder
• 2 1/2 teaspoons cumin
• 2 1/2 teaspoons garlic powder
• 1 1/2 teaspoons onion powder
• 1 1/2 teaspoons kosher salt

Burgers and Veggies:

• 1 medium sweet onion
• 1 large poblano pepper
• 1 medium-large red pepper
• 1 tablespoon olive oil
• 1 pound extra-lean ground beef

Guacamole Topping:

• 1 avocado
• 1/4 cup of your favorite salsa
• 1/8 teaspoon kosher salt
• 1/16 teaspoon black pepper

For Serving:

• 4 whole grain buns

Instructions

1. Prepare and preheat your grill.
2. In a small bowl, combine the chili powder, cumin, garlic powder, onion powder and 1 1/2 teaspoons kosher salt to make the spice mixture.
3. Peel the onion and trim the ends, then cut it into four even horizontal planks so the rings stay together. Remove the stems and cores from the peppers and cut each into four large pieces. Toss or brush the vegetables with olive oil and sprinkle with 2 tablespoons of the spice mixture, coating both sides.
4. In a large bowl, crumble the ground beef and sprinkle with the remaining spice mixture. Mix gently to distribute the spices without overworking the meat. Form 4 patties about 1/2–3/4″ thick and 3 1/2–4″ in diameter, making a small divot in the center of each patty to prevent doming while cooking.
5. Grill burgers and vegetables over medium heat. Cook patties about 8–10 minutes on the first side and 5–8 minutes on the second side, adjusting for your preferred doneness and your grill’s heat. Grill vegetables until crisp-tender; place thicker onion planks on hotter spots and move thin poblanos to slightly cooler areas if needed.
6. Meanwhile, in a medium bowl combine mashed avocado, salsa, 1/8 teaspoon salt and a pinch of black pepper to make a chunky guacamole.
7. Remove the burgers and vegetables from the grill and let the patties rest a few minutes. Slice the vegetables into strips: cut each pepper piece into 4–6 strips and halve the onion planks, separating the rings.
8. Serve each burger on a whole grain bun, pile on the vegetable strips and top with a generous dollop of guacamole. Provide napkins — these are gloriously messy and flavorful.

Notes

Burger divots: Press a small thumb-sized indentation in the center of each patty before grilling to keep them flat as they cook.

Spices: The recipe calls for a generous spice blend to capture authentic fajita flavor. The proportions have been tested to balance heat and aroma.

Make-ahead tips: Prepare the spiced vegetables and form the patties earlier in the day or the night before and store them separately, tightly wrapped, in the refrigerator. Guacamole can be made ahead but will brown on the surface; pressing plastic wrap directly onto the guacamole or making it just before serving helps maintain its color.

Nutrition Information:

Yield: 4 servings
Serving Size: 1 burger

Amount Per Serving:
Calories: 568

Nutrition information is an estimate and may vary with ingredient choices and preparation. Consult a nutrition professional for specific dietary advice.

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