The honey mustard sauce elevated this sandwich beyond expectations! Crispy chicken with tangy-sweet sauce that's both bold and balanced.
Pound the chicken breast to even 1/2-inch thickness, then cut into 4 sandwich-size pieces. Marinate chicken in a mixture of buttermilk, 1 tsp Kosher salt, 1/2 tsp black pepper, 1/2 tsp garlic powder, and paprika for at least 1 hour (copycat tip: buttermilk tenderizes like the real Cane's, with spice boosting juiciness).
Set up dredge: In a shallow dish, whisk flour with remaining salt, pepper, paprika, garlic powder, and onion powder. Beat the egg in another bowl.
Dip marinated chicken into flour mixture, then egg, then back into flour, pressing to build a light but even coating — Cane's style is flour-based, not breadcrumb-heavy (copycat tip: double flour for crispy, light crust).
Heat vegetable oil to 350°F in a heavy skillet. Fry chicken 3–4 minutes per side until deeply golden and cooked through (internal temp 165°F). Drain crisply on a wire rack; do not crowd pan to keep crust light.
For honey mustard sauce: Whisk mayonnaise, Dijon mustard, honey, yellow mustard, and white vinegar until creamy. Taste for balance — this sauce is tangy, sweet, and bold, reminiscent of a Cane's sauce innovation.
Butter sandwich buns lightly and griddle cut sides over medium heat until crisp and golden (just like Texas toast flavor). Build sandwiches with lettuce, tomato, fried chicken, and a generous slather of honey mustard sauce. Serve immediately for best crunch.