Peanut Butter Seven Layer Bars

butter, melted (I use unsalted, but salted tames some of the sweetness)

scant 3/4 cup graham cracker crumbs

semi-sweet chocolate chips

peanut butter chips

sweetened shredded coconut flakes, measured loosely and not packed

minis peanut butter cups (I prefer minis rather than miniature)

two-thirds of one 14-ounce can sweetened condensed milk (eyeball it)

creamy peanut butter