These are so fast and simple. A great recipe for your Christmas or bake sale collection. I didn't dirty any dishes except the pan that held the squares (and a measuring cup) - what a treat!
You basically just layer all the ingredients in a pan and bake for 25 minutes. So. Simple. Here's the recipe followed by my experiments and results:
Magic Squares (yields one 9"x9" pan)
1/2 cup butter, melted
1 1/2 cup graham cracker crumbs
1 (14oz) can sweetened condensed milk
1 cup semi-sweet chocolate chips
1 cup butterscotch chips
1 1/3 cup flaked coconut (I used unsweetened)
1/2 cup chopped nuts (I used toasted walnuts)
Preheat oven to 350F.
In a 9"x9" pan (I used 8"x8" because it's what I had on hand), add melted butter and graham cracker crumbs. Stir until well combined and then press into the pan. Set aside a small handful of the chocolate and butterscotch chips and place the remaining on top of the crumb base. Add nuts. Set aside a handful of coconut and place the remaining on top of the chips. Pour the condensed milk evenly over everything. Sprinkle the chips and coconut that you set aside on top. Bake for 25 minutes and then cool on wire rack.
I've made these twice now. The first time, I layered the ingredients as listed above and overall, this method worked for me. There were a few squares that lost a bit of the bottom crumb, but not enough to piss me off.
The second time I made these, I layered as per the original instructions: crumb base, then the sweetened condensed milk, chips, coconut and nuts. This method set the crumb base better, but I found that there were globs of the condensed milk between the crumb base and the choc/butterscotch chip layer and that kind of made me go "meh".
You could substitute some of the chips for peanut butter chips, Christmas m&ms, or any other similar item.