Warm a nonstick skillet over medium-low heat. Melt the butter in the pan.
Spread peanut butter over one bread piece. Spread marshmallow creme on the other.
Close the sandwich, pressing gently to seal the edges.
Toast in the skillet until golden, about 2 minutes per side.
Rest 1 minute, slice, and serve warm.
Notes
Variation: Layer thin banana slices inside or drizzle a touch of honey before toasting. For a crisper bite, swap butter for 1 tsp neutral oil. Air-fryer method: cook at 370°F for 4–5 minutes, flipping once. Best served immediately; if needed, wrap leftovers in foil and warm briefly in a skillet.This recipe is an original creation inspired by classic Fluffernutter Sandwich Recipes flavors. All ingredient ratios and instructions are independently developed.