When someone else is feeding your kid
parties, playdates, sleepovers, and relatives who mean wellThe cooking is the easy part of this. What's hard is the afternoon your kid walks into someone else's kitchen without you, and most of what makes it hard is the grown-ups.
Ask the same day you say yes
Message the other parent right away. A week out, you're a parent being organized. Two hours out, you're a problem sprung on someone who already bought the pizza.
Two questions is enough. What are you feeding them, and can I send their own? Almost nobody says no to that. It turns a conversation about a disease into one about logistics, which is the one they can actually help with.
Use the words "celiac disease." "Gluten free" sounds like a choice, and a choice is something a kind person will bend for a special occasion.
Send something that looks like what everyone else has
This is the whole trick, and it took us too long to learn. Copy whatever everyone else is getting. If there's pizza, send a slice of gluten-free pizza. If there's cake, send a cupcake in a box.
What you're buying is the moment every kid is holding a plate at once. A child eating carrot sticks while eleven others eat pizza has been fed and still left out. They'll remember the second part.
Feed them before they go, too. Then whatever happens with the food happens to a kid who isn't hungry. Hungry is when a nine-year-old decides one cookie is probably fine.
Where each one goes wrong
It's pizza and cake, and both of them are wheat. Tell the other parent early and plenty of them will add a gluten-free pizza to the order. Otherwise, pick one up on the way from a place you trust, or cook a frozen gluten-free one at home and carry it in. Send a cupcake in its own box as well, and ask for it to come out when the cake does. Ask about the goodie bag, which is the one nobody thinks to check.
Short and low-stakes, so keep it that way. Send a snack, say no thanks to lunch, and collect them before a meal until you know the house.
Breakfast is where it goes wrong, every time. Toast and cereal are what the whole house eats in the morning, and neither one works. Send bread, a labeled tub of butter so nobody dips a shared knife, and something for the midnight round.
Get it in writing. A named adult who knows, a cleaned surface, and a safe snack kept in the classroom for the birthday cupcakes nobody warned you about.
Ask them about the kitchen. A club with a microwave and a shared counter is a different question from one with a real kitchen.
The conversation nobody warns you about
Someone in your family will decide this is overblown. It's usually a grandparent, it's almost always someone acting out of love, and the sentence is nearly always the same: "a little bit won't hurt them."
Arguing about gluten doesn't work, because that isn't really what they're arguing about. What works better is being specific about the mechanism, and unembarrassed about it. It's an autoimmune disease. Their immune system attacks their own intestine when they eat it. That happens whether or not they feel ill afterward.
The damage isn't the stomach ache. The stomach ache is just the part you can see.
Most people get there. Some don't. If someone won't take it seriously, they don't get unsupervised time with your child around food. Nobody is being punished. It's the same call you'd make about a car seat, and it's a horrible one to have to make about your own parents.
The most useful thing we did was make our kid comfortable saying one line out loud to an adult, without apologizing for it: "no thank you, I brought mine." Kids will eat something they know isn't safe rather than make a fuss in front of a room. A rehearsed sentence is what makes not making a fuss possible. There's more on that in talking to your kid.
This is what has worked for one family, not medical advice. How strict your own situation needs to be, and what's safe for your child specifically, are things to work out with your doctor or a dietitian.