Prep and bake. Preheat your oven according to your cake recipe.
Grease and line two round pans with parchment. Divide the batter evenly and bake until a toothpick comes out clean. Cool in pans 10 minutes, then turn out onto racks to cool completely.
Make the buttercream. Beat softened butter until fluffy, 2–3 minutes.
Add powdered sugar in batches with vanilla and salt. Thin with cream until smooth and spreadable. You want a medium consistency that holds soft peaks.
Tint your colors. Divide frosting into bowls: a large portion for golden yellow (face), a medium portion for orange/brown (mane), a small portion for light tan (snout), and a tiny bit for black or deep brown (details).
Go slowly with gel colors so you don’t overdo it.
Level and stack. If needed, level cake tops with a serrated knife. Place the first layer on a board. Add a thin layer of frosting (your choice of color), then top with the second layer.
Apply a thin crumb coat of yellow frosting over the whole cake to seal in crumbs. Chill 15–20 minutes.
Frost the lion’s face. Spread a smooth, thicker layer of golden yellow frosting over the chilled cake. Use an offset spatula to get clean sides and a flat top.
Create the snout. With light tan frosting, pipe or spread an oval on the lower half of the cake.
Smooth the edges so it blends gently with the face. This is where the nose and mouth will go.
Add eyes and nose. Press two chocolate chips (flat side out) near the top third of the face for eyes. Add a chocolate-covered almond or round candy for the nose centered on the snout.
For extra sparkle, dot tiny bits of white marshmallow or fondant on the eyes.
Draw the mouth and whiskers. Use a small round tip with black or dark brown frosting to pipe a short line down from the nose, then curve it into a gentle smile on both sides. Add 3–4 short whisker lines on each side of the snout. If you don’t have a piping bag, snip a tiny corner off a zip-top bag.
Build the mane. Pipe stars or rosettes around the top edge and sides with orange and brown frosting, mixing shades for a lively look.
Or press wafer cookies, pretzel sticks, or even candy corn around the edges for a playful, textured mane. Add orange and yellow sprinkles here if you like.
Optional ears. Pipe two mounds of frosting at the top edge and dot the centers with a darker color. Alternatively, use halved cookies coated with frosting and attach with a dab of buttercream.
Chill to set. Refrigerate the finished cake for 20–30 minutes so the decorations hold their shape.
Bring to room temperature before serving for the best texture.