Preheat the oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.

In a mixing bowl, cream together the butter and sugar until light and fluffy.

Add the eggs one at a time, mixing well after each addition. Stir in the vanilla.

In another bowl, combine the flour, baking powder, and salt. Gradually add to the creamed mixture alternately with milk.

Divide the batter evenly between the prepared pans and smooth the tops.

Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean. Let cool in pans for 10 minutes before transferring to wire racks to cool completely.

In a mixing bowl, beat the softened butter until creamy. Gradually add the powdered sugar, mixing well.

Add the vanilla and milk, mixing until smooth and spreadable. Divide the frosting into bowls and tint with food coloring as desired.

Once the cakes are completely cool, place one layer on a serving plate and spread frosting on top.

Place the second layer on top and frost the top and sides of the cake.

Decorate with dinosaur toppers and sprinkle candy rocks around the base.