In a medium-sized heat-safe bowl, whisk together the egg yolks until well blended. Set aside.

Fill a large bowl half-way with ice. Set a medium-sized metal bowl into the ice and pour the cream into it. Set a medium-mesh sieve on top. Set aside.

In a medium thick-bottomed saucepan with high sides, melt the butter over medium heat, stirring constantly, until it just begins to brown. Add the brown sugar and salt. It will be very thick and sludge-like. Stir until the sugar completely melts, until it looks thick and silky.

Very slowly add the milk, stirring to incorporate. It will spit and foam up initially. Heat until all the sugar is completely dissolved. Do not let mixture boil or it may curdle.

Slowly pour half of the milk and sugar mixture into the eggs, whisking constantly to incorporate. Then add the warmed egg mixture back into the saucepan with the remaining milk sugar mixture.

Stir the mixture constantly over medium heat with a wooden or heatproof rubber spatula, scraping the bottom as you stir, until the mixture thickens and coats the spatula, about 5-7 minutes. Your kitchen should smell like a caramel factory now. :)

Pour the custard through the sieve and stir it into the cream. Add vanilla and stir until cool over the ice bath. Chill the mixture very thoroughly in the refrigerator.

While the mixture is chilling, preheat the oven to 350° F. In a medium bowl, combine melted butter and pecans, stirring to coat. Lay out the buttered pecans on a roasting pan in a single layer. Sprinkle with kosher salt. Bake for 6 minutes, until lightly toasted. Let cool. Once cool, roughly chop the pecans and set aside.

Once the ice cream mixture is thoroughly chilled, freeze in your ice cream maker according to the manufacturer’s instructions.

Once the ice cream has chilled and formed in the ice cream maker, and while still fairly soft, fold in the chopped pecans.

Transfer ice cream to a freezer-safe container with a lid, and place in the freezer for a few hours. If it has been frozen for more than a day, you may need to let it sit at room temperature for a few minutes to soften before serving.