In a small bowl, whisk together the melted butter, vegetable oil, apple cider vinegar, and sugar until the sugar is dissolved and the dressing is well combined.
Melt the butter in a pan. Once melted, turn off the heat, add the broken dry ramen noodles, and mix well. Set aside.
In a large mixing bowl, add the broccoli slaw mix, sunflower seeds, and the ramen noodles.
Pour the dressing over the salad mixture. Toss everything together gently to coat the broccoli slaw, noodles, and seeds evenly.
Cover the bowl and refrigerate for at least 1 hour before serving to allow flavors to meld.