Make the buttercream by mixing the butter and icing sugar until combined.

Add milk to loosen the mix until spreadable and flavour with extract.

Split the buttercream into 4 equal parts.

Color one part pink, one part yellow, and one part green.

Spread the green buttercream over the base cake, leaving edges for a soil effect.

Let the buttercream set slightly while icing the cupcakes.

Ice 3 cupcakes pink, 3 yellow, and 3 with uncolored buttercream.

Go back to the base cake and use a fork to create a spikey grass texture.

Create fluffy feathers on the yellow cupcakes using a fork.

Dip large marshmallows in glimmer sugar and press into pink and plain cupcakes.

Attach orange button-shaped sweets to yellow cupcakes for beaks and feet.

Add chocolate chips above the noses and beaks for animal eyes.

Press halved mini marshmallows onto plain cupcakes for cow ears.

Shape mini marshmallows into ovals and press onto cupcakes for pig snouts.

Pipe black dots on cow snouts for nostrils.

Pipe pink dots on pig snouts for nostrils.

Mix cocoa with leftover buttercream and use for cow markings.

Add decorative elements like sugarpaste barn, duck marshmallows, and mini chocolate eggs to the base cake.

Consider using chenille easter chicks, plastic fences, or toy animals for added decoration.