1. Prepare the Dough

1. In a small bowl, stir the yeast into the warm milk. Let it sit for about 5 minutes until bubbles form.
2. In a large mixing bowl, combine flour, sugar, and salt.
3. Add the yeast mixture, eggs, melted butter, and vanilla to the dry ingredients.
4. Knead for 8–10 minutes until the dough is smooth and elastic.
5. Cover the bowl with a clean towel and let the dough rise in a warm place for 1–2 hours, or until doubled in size.

2. Make the Filling

1. In a small bowl, mix brown sugar and cinnamon.
2. Roll out the dough into a 12×18-inch rectangle on a lightly floured surface.
3. Spread the softened butter evenly over the dough.
4. Sprinkle the cinnamon-sugar mixture evenly across the buttered surface.

3. Shape and Bake

1. Roll the dough into a tight log, starting from the long edge.
2. Shape the log into a ring, pinching the edges together to seal.
3. Place the ring on a parchment-lined baking sheet, cover, and let it rise for 30 minutes.
4. Preheat the oven to 350°F (175°C).
5. Bake for 25–30 minutes, or until the cake is golden brown.

4. Add the Glaze and Decorations

1. Once the cake has cooled, whisk together the powdered sugar, milk, and vanilla extract to make the glaze.
2. Drizzle the glaze over the cake, letting it slightly drip down the sides.
3. Immediately sprinkle the purple, green, and gold sugar over the glaze before it sets.
4. Optionally, insert a small baby figurine into the bottom of the cake before serving.