Start the game and open your garden
Find the cake recipe or cake ingredients in the crafting/recipe menu
Gather required ingredients from your farm (and any other sources the game specifies)
If needed, plant or harvest missing ingredients first
Open the crafting/cooking station used for baking
Select the cake recipe
Add the gathered ingredients to the recipe
Confirm or start crafting to bake the cake
Collect the finished cake from the output slot/inventory
Store the cake or use it where the game requires (feeding, completing tasks, quests, or selling)