Maraschino cherries IMO are a blaspheme to nature itself with bleaching & dyeing and all sorts of hideous processes done to these beautiful little drupes, check out these All Natural Maraschino Cherries I found at Chukar Cherries *not sponsored
Prepare the cake recipe of your choice as per the instructions on that post
Add the mini chocolate chips and the cherry extract & bake the batter into 3-7" cake pans
While the cakes are baking & cooling prepare the buttercream recipe as per the instructions on that recipe post
Divide the buttercream into 4 parts: ½ cup dark green / ½ cup light green/ ½ cup white
The remaining buttercream leftover will be for the filling & icing colored pink as shown in the picture
Notes
Be sure to read all the notes for success section above the recipeStorage Cherry chip cake can be stored at room temperature in a cool spot lightly covered for up to 3 days. Refrigerate for longer storage up to 1 week. Freeze for up to 2 months