Why did my toffee separate or look greasy?
This usually happens if the butter and sugar did not fully emulsify, or the mixture did not boil long enough. Bring it to a full rolling boil, then boil about 3 minutes. Look for a unified, glossy mixture (not streaky or oily). Use real butter, not a spread.
Do I need a candy thermometer?
No. For this style of saltine toffee, timing plus visual cues are enough. You want a smooth, glossy boil, then a brief bake to finish setting the toffee layer.
Why are my saltines floating?
They can shift if the toffee is poured unevenly. Pour slowly, then nudge with an offset spatula to cover. Once the toffee hits the oven heat, it settles and grips the crackers.
How do I cut it cleanly without shattering the chocolate?
Let it set fully, then use a large knife warmed under hot water and dried. Score first, then press down firmly. If it is very cold, let it sit 5 to 10 minutes before cutting.
Can I use milk chocolate or white chocolate?
Absolutely. Milk chocolate is sweeter. White chocolate is extra sweet, so I recommend a pinch of flaky salt on top to keep it balanced.
Can I make it gluten-free?
Yes, use gluten-free saltine-style crackers. The method is the same.
Is 400 F too hot?
400 F is a common, fast method, but ovens vary. If your oven runs hot or you are worried about dark edges, bake at 350 F instead and add a couple extra minutes. Either way, watch closely and pull it when the toffee is bubbling all over.
