Preheat your waffle cone maker to a medium color setting, around 4, and lightly brush both plates with oil.
In a small bowl, whisk together egg whites, sugar, and vanilla extract.
Add in the salt and half of the flour, mixing well.
Then, pour in the melted butter and the rest of the flour, beating until the batter is smooth and lump-free.
Place about 2 tablespoons of the batter in the center of the preheated waffle cone maker.
Close the lid, lock it, and cook for approximately 1 minute and 30 seconds, adjusting the time for your desired color.
Using a wooden fork, carefully transfer the cooked waffle onto a clean towel.
Roll it around the cone mold, pinch the bottom to seal, and hold it for 10 seconds until it keeps its shape.
Drop a few chocolate chips into the cone and use a small dowel to press them down, sealing the tip.
Let the cones cool completely before storing in an airtight container.