I have done it with Instant before and the only difference was that the crumble was a bit softer... To be honest no one noticed 🤷🏼♀️ and it was just as good..
Sara M.
My Mum used to make hers without. She made it with brown sugar on top.
hazel92736
i think a streusel topping is pretty similar to crumble (i'm british and we don't rly do streusel), it might be close enough! i'm unsure on instant oats
Deb
Flour and butter work well👍
Patrícia
Thanks everyone! I'll stick to flour and butter 😄 (Dreamfaery i might try the instants if want a softer crumb, thanks for the tip!!)
Starshine
We have made it with instant oats, and honestly, it works just as well. ☺️