1 1/2 bags chocolate chips (11.5 oz size)
1 can sweetened condensed milk (14 oz)
Put the sweetened condensed milk in a microwaveable bowl along with the chocolate chips. Microwave for 1 minute, stir, then microwave again for about 30 seconds, stir well and scrape into an 8 x 8 pan lined with parchment. Let cool in the fridge for at least an hour.
So, your microwave is different so whatever it takes to just melt the chips. Do not let it go too long as the chips will burn. The cooling may take longer as well, depending on the type of pan, fridge setting, etc. Let cool until firm and able to be cut.