Grilled Steakburgers with Frozen Custard Aioli and Crispy Onions

By AislePrompt Editorial · Published 2026-06-18 · Updated 2026-06-18

How this recipe was made — this recipe was drafted by AislePrompt's AI-assisted pipeline from technique templates and USDA-sourced nutrition data, and published by AislePrompt Editorial — see how AislePrompt recipes are developed and reviewed.

Juicy grilled steakburgers topped with a unique frozen custard aioli and crispy fried onions for a flavorful twist on a classic fast-casual favorite. This American-inspired beef recipe, ready in about 35 minutes, pairs ground beef (80/20), salt, black pepper for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 600 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 20 min Cook: 15 min Serves 4 American cuisine 600 cal/serving

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Ingredients

1 lb ground beef (80/20)
1 tsp salt
1/2 tsp black pepper
4 burger buns
1/3 cup frozen custard
1/4 cup mayonnaise
1/4 tsp garlic powder
1 medium yellow onion, thinly sliced
1/2 cup all-purpose flour
1 cup vegetable oil
4 lettuce leaves
8 tomato slices

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Instructions

Step 1: Preheat grill to medium-high heat (about 400°F). Meanwhile, form 1 lb ground beef into four 4-inch patties, pressing a slight indentation into the center of each. Season both sides with 1 tsp salt and 1/2 tsp black pepper.
Step 2: In a small bowl, stir together 1/3 cup frozen custard, 1/4 cup mayonnaise, and 1/4 tsp garlic powder until smooth. Refrigerate until ready to serve.
Step 3: Heat 1 cup vegetable oil in a deep skillet over medium-high heat. Toss 1 medium thinly sliced yellow onion with 1/2 cup all-purpose flour to coat. Fry the coated onion slices in batches for 2-3 minutes until golden brown and crispy; drain on paper towels.
Step 4: Grill the burger patties for 4-5 minutes per side or until desired doneness is reached.
Step 5: Toast 4 burger buns on the grill for 1 minute until lightly browned.
Step 6: Assemble burgers by spreading about 1 tbsp frozen custard aioli on the bottom bun, adding a cooked patty, topping with 2 tomato slices, a lettuce leaf, and a handful of crispy onions. Cover with the top bun and serve immediately.