Recipe search on voice is not traditional keyword-based search, it's a search for a dish that fits their taste palate, or fits their diet needs or what they can cook with that chicken lying in the fridge
Personalization is the key to engagement. Consumers expect your skill to remember their preferences and deliver aptly the relevant content
Consumers browse recipes to check on the ingredients they need and they would love it if your skill can add the ingredient list to their shopping list
Nothing can improve the recipes or the experience than direct consumer feedback, do it realtime when they just finished cooking!
Adding contextual chef tips and setting automatic reminders based on cooking step time would make consumers love the skill