Line a cookie sheet with a silicone baking mat or parchment paper and set aside.
With your mixer, beat the softened butter until creamy, about 2 minutes on medium-high speed.
Add in the sunbutter and continue to beat until combined, about 1-2 minutes on medium speed.
Slowly add in the powdered sugar, vanilla and salt. Mix on low speed for about 1-2 minutes or until fully combined. The mixture may look a little crumbly, but it’s ok.
Using a medium cookie scoop (or about 1-½ tablespoons of filling), scoop up the filling, placing them on the cookie sheet. Once all scooped, roll into balls, then flatten each ball so that it is about ¾ to 1” thick. Shape into an egg with your fingers and place back onto the cookie sheet. If the mixture is too soft to shape, place into the refrigerator for about 10-15 minutes to firm up and then continue. TIP: If the mixture is too sticky when shaping, add a little powdered sugar to your hands and then shape. Once the mixture is all shaped, refrigerate for at least 1 hour to firm up the eggs before dipping.
When you are ready to dip your filling, melt the candy bark or chocolate in the microwave in 20-30 second intervals. Stir, making sure the chocolate is smooth. If it feels too thick, add in about 1 tsp of oil and stir. Cool for a couple of minutes before dipping the eggs.
To dip, place the filling into the chocolate and submerge it. Using a three-prong dipping fork (or a regular fork), bring the egg up to the top, tapping it lightly to remove any excess chocolate before placing it down onto your cookie sheet. TIP: use the dipping spear (or another fork or a toothpick) to help slide the egg off the dipping fork. Continue the process until all eggs are covered; just note that you may need to rewarm your chocolate if it gets too firm or chill the filling in the refrigerator if it gets too soft. Drizzle any excess chocolate on top of the egg. Refrigerate the candies to help them fully set before serving.
Keep candies refrigerated until serving. Yields about 15-18 egg candies (depending on thickness of candies).