First things first, get your pan ready. Line an 8x8 inch or 9x9 inch square baking pan with parchment paper or foil, leaving some overhang on the sides.
In a medium microwave-safe bowl, combine the white chocolate chips and the entire can of sweetened condensed milk.
Microwave on 50% power, stirring every 30-60 seconds, until the mixture is smooth and completely melted. This usually takes about 2-3 minutes total. (Alternatively, do this in a double boiler on the stovetop, stirring constantly).
Once melted and smooth, stir in the chopped pecans and the chopped divinity candy pieces. Make sure everything is evenly distributed.
Quickly pour the mixture into your prepared pan and spread it out evenly with a spatula.
Now comes the hardest part: waiting! Let the fudge set completely. You can leave it at room temperature for a few hours, or pop it in the refrigerator for 1-2 hours to speed things up. It needs to be firm enough to cut.
Once set, use the parchment or foil overhang to lift the whole block of fudge out of the pan. Place it on a cutting board.
Cut into squares using a sharp knife. Wipe the knife blade occasionally for cleaner cuts.
Serve and watch it disappear!