Line a 8x8" pan with parchment, allowing an overhang on two sides

Mix the butter, crumbs, and coconut in a bowl, and press into pan

(OPTIONAL: bake in a preheated 375F oven 8 minutes) or -refrigerate 2-4 hours

Meanwhile, melt the chips and milk at 50% power at 30 second intervals, stirring well between each until chips are smooth and melted

Beat in the zest and juice, and pour over crust.

Chill several hours to overnight before slicing.

Store in the refrigerator