Make Skillet Pineapple BBQ Chicken: sear thighs and glaze with pineapple-BBQ for a sweet-tangy skillet dinner in 35 minutes.
Warm a large, oven-safe skillet over medium heat until it is hot and ready, then add the cooking oil and swirl to coat the surface. While the skillet comes up to temperature, pat the boneless skinless chicken thighs dry and season both sides with a light pinch of salt and a few cracks of black pepper; press the seasoning gently into the meat so each thigh will brown evenly when it hits the hot surface.
Place the seasoned chicken thighs into the shimmering oil and let them cook undisturbed until a deep golden-brown crust forms on the bottom, then flip and repeat on the other side until the thighs are cooked through. Remove the cooked chicken to a clean plate and rest briefly — those browned bits left in the skillet are flavor gold for the sauce.
While the chicken cooks, open the can of pineapple slices, drain them into a sieve or small bowl, and reserve the sweet juice in a small measuring jug. Keep the pineapple slices whole and the juice set aside — that bright, acidic liquid will be the main thinning and sweetening agent for the sauce.
Turn the heat low and pour about half a cup of the reserved pineapple juice into the warm skillet, stirring and scraping to dissolve the sticky browned bits from the bottom. When the fond has loosened, add the BBQ sauce and stir gently until the mixture thickens into a glossy, cohesive glaze; taste and adjust with a tiny pinch of salt or another splash of pineapple juice if it becomes too thick.
Return the cooked chicken thighs to the skillet and nestle the pineapple slices between and on top of the pieces, dredging both sides in the sticky pineapple-BBQ glaze so everything is evenly lacquered. Spoon any excess sauce over the tops so every surface gleams — this is the moment the sweet-tangy glaze visibly transforms the chicken.

Move the skillet briefly under a high broiler (or mimic the same intense direct heat briefly) until the BBQ glaze just starts to bubble and caramelize at the edges, creating deep mahogany spots and a slightly blistered texture on both chicken and pineapple. Remove from the heat and transfer back to the surface so the caramelized sugars set and the glaze tightens.
Sprinkle the thinly sliced jalapeño and the sliced green onions over the caramelized chicken and pineapple, letting the bright green ribbons contrast with the glossy, deep-red glaze. Serve the skillet directly on the painted white surface for a family-style presentation — the dish should steam lightly and look shiny, slightly charred at the edges, and ready to dig into.
