After-school snack drama: picky eater turns into a mini food critic

My 5-year-old has always been a bit picky, but lately it's like every after-school snack is a negotiation. We've tried everything from fruit smoothies to homemade granola bars, but she insists she only wants specific brands of crackers or 'fun' shaped snacks. I’m trying to keep it healthy, but it’s exhausting to constantly shop for these particular items and then still get a meltdown if she doesn’t get exactly what she wants. I’ve also experimented with involving her in snack prep, hoping that might spark some interest in eating what she helped make, but she ends up rejecting those too. I want to avoid turning snack time into a power struggle but also don’t want to give in to all the picky demands. Has anyone dealt with a kid who suddenly becomes so picky after school? How do you balance keeping snacks nutritious without driving yourself crazy trying to meet very specific preferences? Any creative snack ideas that worked to get picky eaters excited without tons of prep or expensive ingredients?