Line an 8x8 baking pan with parchment paper. Set aside.
Add Nutella, chocolate chips and sweetened condensed milk to a microwave-safe bowl. Microwave in 30 second increments, stirring after each until mixture is melted and smooth.
Stir in vanilla and chopped pretzels.
Spoon mixture into your parchment lined pan then level the top with a spatula.
Press mini pretzels into the top of fudge.
Cover pan with plastic wrap then place in the refrigerator to chill for 4 hours until fudge sets completely.
Sprinkle fudge with sea salt then slice into squares and serve.
Store fudge in an airtight container in a cool dry place. For optimal pretzel freshness, consume within a few days of making.
