My grandpa really likes Mounds Bars, so I Googled "homemade mounds bars" to find some recipes. Of the two I found, this one was better (below). I will make yours and test them against each other to find the family favorite.
Homemade Mounds Bars
5 oz. sweetened condensed milk
1 teaspoon vanilla
2 cups powdered sugar
14 ounces flaked coconut
24 ounces semisweet chips
Blend the milk and the vanilla. Add the sugar a little at a time till
smooth. Stir in the coconut. The mixture should be firm. Pat firmly
into a 9x13 pan and chill till firm. Cut into bars and dip into melted
chocolate and let cool on waxed paper for several hours.