Preheat oven to 475°. Grate frozen butter using a box grater or cheese grater. Mix grated butter and flour in a bowl, and put in fridge to chill for 10 minutes.
Make a hole in the middle of the mixture, stir Wicked Jalapeño Relish into buttermilk in a separate bowl, add wet mixture to dry mixture and stir.
Turn dough out onto a lightly floured counter, and sprinkle more flour on top of the dough. Using a floured rolling pin, roll dough into a 3/4-inch-think rectangle. Fold dough in half so short ends meet, repeat rolling and folding process 4 more times.
Roll dough to 1/2-inch thickness and cut with a round cutter, or use the mouth of a glass that has been floured.
Place rounds on a parchment paper-lined baking sheet and bake for 15 minutes or until lightly browned. Brush with melted butter.