Sift the dry ingredients (including sugar) together in a large bowl.
Mix the wet ingredients together in a medium bowl.
Add the wet to the dry and mix until just combined.
Divide the mixture into cupcake papers.
Bake at 340F for about 20 minutes or until the centers are springy to the touch. Baking time depends on the size of your cupcakes.
For the Buttercream:
Beat the butter until light and fluffy, add the sugar a cup at a time and beat well. Mix in milk until desired consistency is reached. Add vanilla and green food coloring.
For the Assembly:
Use a spatula to add a layer of grass to the cupcakes. Transfer the rest of the buttercream to a piping bag fitted with a 133 tip.
Roll fondant into small balls. Wet and roll in sanding sugar.
Press some fondant into a rounded glass or small bowl to form the body.
Roll some fondant out to a thin sheet. Use the back of a piping tip to cut circles for the feet. Roll the circles out a bit to form ovals. Mix the pink food coloring with a small amount of fondant. Roll out and use 2 small round piping tips to create the pads for the feet.
Assemble by brushing a small amount of water where the fondant needs to be joined.
Pipe grass around the edge of the cupcake. Place the bunny. Fill in with the grass tip.