Directions

for the buttercream:

1. In a stand mixer with a whisk attachment, cream butter until it is soft and smooth.
2. Add powdered sugar, milk, vanilla and green food coloring. Mix until combined.
3. Using an offset spatula, divide the Oreo in half and scape off the center filling.
4. Place buttercream in a pipping bag, and pipe a large dollop of buttercream in the center.
5. Sandwich the cookie back together.

for the classic dip Oreo:

1. Place wax or parchment paper on a flat work surface.
2. Put melting chocolate in a microwave safe bowl. Microwave the chocolate in 30 second increments, stirring after each heating, until it is melted.
3. Dip each cookie halfway into the chocolate, coating the back and front evenly.
4. Lightly tap the cookie on the rim of the bowl to get off any excess chocolate.
5. Place cookie on paper and add sprinkles.
6. Repeat this process with the rest of the cookies and let them cool on the paper until the chocolate is completely hardened.

for the custom center Oreos:

1. Place wax or parchment paper on a flat work surface.
2. Put melting chocolates in a microwave safe bowls. Microwave the chocolates in 30 second increments, stirring after each heating, until melted.
3. Using a spoon, drizzle both colors of chocolate over the Oreo.
4. Quickly add sprinkles before the chocolate hardens.