Preheat the oven to 175°C. Grease 2 or 3 round cake pans and line them with parchment paper.

In a large bowl, sift together the flour, baking powder, and salt.

In another bowl, beat the butter and sugar until light and fluffy. Add the eggs one at a time, beating well after each addition.

Mix in the vanilla extract.

Gradually add the flour mixture and milk, alternating between the two, beginning and ending with the flour mixture. Mix until just combined.

Divide the batter evenly into separate bowls and mix in different food colorings to each bowl.

Pour the differently colored batters into the prepared pans. Bake for 25-30 minutes or until a toothpick inserted into the center comes out clean. Let the cakes cool completely on wire racks.

While the cakes are cooling, prepare the buttercream frosting by beating the butter, powdered sugar, vanilla extract, and milk until smooth and creamy.

Once the cakes are cool, stack them with a layer of buttercream between each layer. Cover the entire cake with a thin layer of frosting (crumb coat) and chill for 30 minutes.

Apply a thicker layer of frosting, smoothing it out for a neat finish.

Roll out the skin-tone fondant and cover the entire cake. Smooth it out with your hands or a fondant smoother.

Use the various colored fondants to craft Therese's facial features - her eyes, mouth, and hair. Adhere the details to the cake using a small amount of water.

Use edible paints to add any subtle details like shadows or highlights to enhance the likeness.

Finish by adding a light dusting of edible glitter for a touch of shimmer.