1. 1. Prepare Your Workspace: First, line a baking sheet with parchment paper or wax paper and lightly grease your hands or a spoon with butter or cooking spray. This will prevent the sticky mixture from adhering too much.

2. 2. Melt Butter and Marshmallows: In a large microwave-safe bowl, combine the unsalted butter and mini marshmallows. Microwave on high for 1 minute, then stir. Continue microwaving in 30-second intervals, stirring after each, until the marshmallows are completely melted and smooth. This usually takes about 2-3 minutes total.

3. 3. Stir in Vanilla: Once the marshmallow mixture is smooth, stir in the vanilla extract until well combined. The vanilla adds a lovely depth of flavor to the nests.

4. 4. Combine with Cereal: Add the puffed rice cereal to the marshmallow mixture. Using a buttered spatula or spoon, gently fold the cereal into the marshmallow mixture until it is evenly coated. Be careful not to crush the cereal too much.

5. 5. Form the Nests: While the mixture is still warm, scoop about 1/4 cup of the cereal mixture into your greased hands. Shape it into a small nest by pressing your thumb into the center to create an indentation. Place each nest onto your prepared baking sheet. Repeat with the remaining mixture.

6. 6. Chill the Nests: Place the baking sheet with the formed nests into the refrigerator for about 15 minutes. This helps them set and become firm, making them easier to handle and decorate.

7. 7. Melt the Chocolate: While the nests are chilling, melt the chocolate chips. You can do this in a microwave-safe bowl in 30-second intervals, stirring until smooth, or over a double boiler. Stir in the vegetable or coconut oil until the chocolate is glossy and smooth.

8. 8. Decorate and Finish: Once the nests are firm, drizzle or spread a small amount of melted chocolate into the center of each nest. Immediately place 2-3 mini candy eggs into the chocolate before it sets. Let the chocolate fully harden at room temperature or in the refrigerator for a few minutes before serving.