Combine sugar, peanut butter, and butter in a bowl mixing until dough forms.: The bowl will quickly become fragrant with nutty peanut butter , and you should feel the mixture turning from separate ingredients into a cohesive, slightly tacky dough. Mix until no dry streaks of powdered sugar remain and the surface looks smooth. You want a consistency that holds together when squeezed but is not greasy. If the dough seems crumbly, it indicates the butter may be too cold, or the peanut butter needs a stir; add a touch more peanut butter to bring it together. Avoid overmixing, as that can warm the fats and make the dough too soft.
Shape into 1-inch balls and place on a baking sheet lined with wax paper. Chill for 30 minutes.: Rolling the dough into uniform balls ensures even chilling and a consistent bite. The smoothness of the ball's exterior matters because bumps can cause the coating to pool unevenly. As you roll, you will notice the dough becoming slightly firmer from the heat of your hands; if it gets too soft, briefly chill your palms or the mixture. A common mistake is making balls too large, which changes the bite and chilling time, so aim for roughly 1 inch in diameter.
When done chilling, melt candy coating according to package directions until smooth and dip balls coating them completely. Allow excess to drip off and place back on waxed paper-lined baking sheet.: Chilling firms the centers so they hold their shape during dipping. You will feel the texture change from pliable to slightly firm, and the surface will stop sticking to your fingers. This step reduces the risk of the centers falling apart in the warm candy coating. If you skip or shorten chilling, the balls may absorb too much coating or become misshapen. Place them in a single layer to ensure uniform cooling, and resist the urge to crowd the pan.
Top with sprinkles and chill for an additional 15-20 minutes. ENJOY!: The melted vanilla candy should be glossy and flow easily off a spoon. Dip each chilled ball and watch the coating wrap it like a thin shell, then lift and let excess drip off. The visual cue to stop dripping is when the coating forms a smooth surface without streaks or gaps. Overheating the coating can cause it to thicken or seize, so follow the package heat guidelines closely. If the coating becomes grainy, remove it from heat briefly and stir gently to restore smoothness.
Allow excess to drip off and place back on waxed paper lined baking sheet: After dipping, set each snowball back onto the wax paper and listen for a faint settling sound as the coating calms. The underside should set without flattening; if you see puddles forming under the balls, it means too much coating was used or the center was too warm. Use a fork or dipping tool to gently lift and release any pools, ensuring an even base. Avoid touching them until the coating firms, because fingerprints will mar the finish.
Top with sprinkles and chill for an additional 15 20 minutes: Sprinkles adhere best when the coating is still tacky, so apply them immediately after placing the dipped balls onto the sheet. The short final chill locks the coating into a crisp shell and helps sprinkles settle without sinking. Expect a subtle cracking sound when you bite in after chilling, signaling a set shell and soft interior. A typical pitfall is waiting too long to add sprinkles, which results in poor adhesion, or placing them on coating that is too hot, which causes colors to bleed.