2 tablespoons sweetened condensed milk, or more to taste
2/3 cup strong brewed coffee
1 teaspoon non-dairy creamer (such as Coffee-Mate®), or more to taste
1 teaspoon hot cocoa mix (such as Godiva®), or more to taste (optional)
Pour some boiling water in a glass. Let sit to warm the glass, about 1 minute. Pour out water.
Pour condensed milk into the warmed glass. Top with coffee. Stir in creamer and hot cocoa mix.