If using tequila, mix tequila and Bloody Mary mix together over ice in a cocktail shaker (if not using alcohol, simply shake mixer). Pour into six 3-ounce shot glasses. Set aside.

Pat shrimp dry with a paper towel. Pepper generously, add a pinch of cayenne and celery salt.

In a Good Cook skillet, melt Challenge Butter over medium-high heat. Add shrimp to hot butter and cook until pink. Flip and cook the other side until cooked through.

Remove from heat, drizzle with lime juice and zest. Allow to cool slightly, then skewer two shrimp each onto six 4-inch toothpicks or cocktail skewers.

To serve, slide shrimp skewers into prepared shot glasses. Garnish with parsley.

Serve warm or cold.