In a large mixing bowl, cream together the softened unsalted butter and white sugar until light and fluffy. This should take about 2-3 minutes with an electric mixer.
Mix in the vanilla extract and salt, ensuring they’re well combined.
Gradually add the flour and yellow cake mix to the mixture. Stir until everything is well blended. If the dough feels too crumbly, add 3-4 tablespoons of milk, one tablespoon at a time, until the dough comes together.
Gently fold in the sprinkles, giving your truffles a pop of color and fun.
Using a cookie scoop or your hands, form the dough into small balls, about 1 inch in diameter. Place them on a baking sheet lined with wax or parchment paper.
Refrigerate the truffles for about 30 minutes to 1 hour, or until they are firm.
While the truffles are chilling, melt the almond bark or vanilla flavored coating in a microwave-safe bowl. Heat in 30-second intervals, stirring in between, until smooth.
Once the truffles are firm, dip each one into the melted coating, covering it completely. Roll the coated truffles in the remaining sprinkles or the 4 tablespoons of yellow cake mix for an extra layer of flavor.
Place the coated truffles back on the baking sheet and let them set until the coating hardens.