Step 1

Add salted butter, dark chocolate and sweetened condensed milk to a clean saucepan

Step 2

Melt on low heat then set aside

Step 3

Sift powdered sugar into a clean small bowl

Step 4

Mix powdered sugar into chocolate mixture

Step 5

Line a clean baking sheet with parchment paper

Step 6

Transfer chocolate mixture to baking sheet

Step 7

Sprinkle with lime and sea salt

Step 8

Let cool completely

Step 9

Cut into squares