Butter One Side Of Each Slice Of Bread With 1 Tablespoon Of Butter. Melt The Remaining Tablespoon Of Butter In A Skillet Over Medium Heat. Place One Bread Slice Butter-Side-Down Into The Skillet, And Top With The Cheddar Cheese, Pickle Slices, And Onion. Place The Remaining Slice Of Bread Butter-Side-Up Onto The Sandwich. Cook Until Crispy And Golden Brown On Both Sides, 5 To 7 Minutes.