Unwrap butter and place in 13" x 9" pan. Place pan, with butter, in the oven and turn the oven on to 350*F. Butter can melt in pan while preheating. Keep an eye on it, checking every few minutes and pulling out of the oven when butter is melted. Please be careful while preparing recipe as pan will be very hot.
Crush graham crackers in a food processor to create graham cracker crumbs (or buy crumbs).
When butter is melted, remove pan from oven and carefully sprinkle the graham cracker crumbs over the melted butter. Press in lightly with fork or back of spoon.
Pour sweetened condensed milk over the crumb layer.
Sprinkle 1/2 of the chocolate chips, 1/2 of the M&M's & the nuts over the sweetened condensed milk layer. Sprinkle coconut on top, followed by remaining chocolate chips & M&M's.
Bake in oven for 25-30 minutes or until lightly browned. Remove from oven. Allow bars to cool completely. Slice, give and enjoy!