Pat the cubed chicken bites completely dry with paper towels to ensure a crispy golden sear.
In a medium bowl, toss the chicken with 1 tablespoon of olive oil, smoked paprika, garlic powder, onion powder, sea salt, and black pepper until every piece is evenly seasoned.
Heat a large 12-inch cast-iron skillet or heavy frying pan over medium-high heat with the remaining 1/2 tablespoon of olive oil until shimmering hot.
Add the chicken bites in a single layer without overcrowding (cook in two batches if necessary). Sear undisturbed for 3 to 4 minutes until deeply browned and crispy on the bottom.
Flip the chicken pieces and sear for an additional 2 to 3 minutes until cooked through (internal temperature reaches 165°F / 74°C).
Reduce the heat to low. Push the chicken to the sides of the pan and drop the cold cubed butter and minced garlic into the center.
Allow the butter to melt and foam for 60 seconds, stirring the garlic continuously so it turns fragrant and sweet without burning.
Toss the chicken bites thoroughly in the bubbling garlic butter, spooning the pan sauce generously over the meat. Remove from heat, sprinkle with fresh parsley and a squeeze of fresh lemon juice, and serve sizzling hot!