Crush Oreos: In a food processor, pulse Oreos (filling and all) until they become fine, uniform crumbs. Transfer to a large bowl.
Mix: Add the softened cream cheese to the Oreo crumbs. Mix with a spatula or your hands until fully combined and no streaks of cream cheese remain.
Shape: Scoop about 1½ tablespoons of the mixture. Roll into a ball, then gently shape into an oval to resemble an egg. Place on a parchment-lined baking sheet. Repeat with remaining mixture.
First Chill: Refrigerate the shaped eggs for at least 1 hour, until very firm.
Melt & Dip: Melt the 10 oz of white candy coating in a deep microwave-safe bowl according to package directions. Using a fork or dipping tool, dip each chilled egg into the melted coating, turning to coat. Let excess drip off, then return to the parchment-lined sheet. Let the white coating set completely (about 10-15 minutes).
Prepare Colors: Melt small amounts of extra white coating in separate small bowls. Stir in gel food coloring until you reach your desired pastel shades.
Decorate: Drizzle, dip, or pipe the colored coating onto the set eggs. If using sprinkles, add them now while the coating is wet.
Final Chill: Refrigerate the decorated eggs for 15-20 minutes to set all the coatings.
Serve: Serve chilled or at room temperature. Store leftovers in an airtight container in the refrigerator.