Combine chocolate chips and sweetened condensed milk in TupperWave® Stack Cooker 1¾-Qt./1.75 L Casserole and microwave on high power 2½–3½ minutes, stopping to stir halfway through. Stir in vanilla.
Finish it off
Line UltraPro 2-Qt./2 L Casserole Pan with parchment paper. Pour mixture into pan and refrigerate until set, 1–2 hours. Remove from pan before cutting. Store in a sealed Tupperware container until ready to eat.