Toast & set aside Warm a dry skillet over medium heat; toss pecans until fragrant, about 3 minutes. Combine pecans with coconut in a large bowl.
Cook the syrup In a heavy saucepan stir together both sugars, butter, and evaporated milk. Keep heat at medium, stirring until the butter melts and sugars dissolve.
Reach soft‑ball stage Crank heat to medium‑high; boil while stirring 3–4 minutes, or until a candy thermometer reads 235–240 °F / 112–116 °C. (Drop test: syrup forms a soft ball in cold water.)
Finish & scoop Pull pan from heat. Quickly mix in vanilla, salt, plus the pecan‑coconut combo. Working fast, spoon heaping tablespoons onto parchment paper, nudging each mound into a rough circle.
Cool to set Leave pralines at room temp 30 minutes. Once firm, peel away the paper and devour—or store for later.