Decide your use: fresh slices/salads vs baking (pie, crisp, roast). Crunch priority wins for fresh; slice-hold priority wins for baking.
Choose the substitute that matches Honeycrisp’s texture: Fuji and Gala for crisp sweetness; Pink Lady/Braeburn for slice-hold.
Use the listed ratio. If your substitute is softer (McIntosh/Cortland), use ¾ as much and expect more break-down in baking.
Prevent browning: toss cut apples with a squeeze of lemon (or a light pinch of salt) and use within 15–30 minutes for best color.
Taste and adjust: if the replacement is tarter, add a small pinch of sugar; if it’s sweeter than Honeycrisp, reduce added sugar by a small amount.