Preheat oven to 350°F (177°C).

Grease and flour two 8- or 9-inch round cake pans.

In a large bowl, beat butter and sugar until fluffy.

Add eggs one at a time, then mix in mashed bananas, vanilla, and maple syrup.

In a separate bowl, mix flour, salt, and baking powder.

Alternate adding dry ingredients and milk to the wet mixture.

Divide batter evenly between pans and bake for 30–35 minutes.

Let cool completely on racks (1–1.5 hours).

Beat butter until light.

Gradually add powdered sugar, then milk to reach desired consistency.

Tint buttercream with green, brown, or blue for landscape effects.

Level cake layers. Stack with frosting between each layer.

Insert boba straws for stability.

Apply a crumb coat (thin layer of ganache or buttercream). Chill for 30 minutes.

Add a second layer of frosting and smooth the surface.

Roll fondant and cover the cake smoothly. Use texture mats for dinosaur skin.

Create fondant rocks, trees, and dino tracks. Use edible paints for detail.

Position toppers and create a mini landscape with grass and rivers using buttercream.

Chill until ready to serve.

Transport in a sturdy cake box with support dowels and non-slip mats.