How can hot dog buns be cut all the way through but also stuck together in the package so they have to be torn apart?
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The buns are baked in pairs, hence they stick together, they are then split from the 2 outside edges.
The left bun is cut along the left side and is joined on the right side. Right bun is cut on right edge, joined on left. They are rolled separately as dough, but join while the dough rises.
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It’s done by spinning blades. Most hot dog buns come as 3’s ( the dozen or 6 pack). There’s 1 blade that cuts 1 bun on outside and another blade that cuts the insides of 2 buns. They stay together.
Source: I use to manage a bread and roll plant that made 1000 rolls (buns) a minute..
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The water jet is what puts the split on the top of the roll or bread. It’s like a cut, just after the proof. Once baked, it looks like a scare. This is the automated process, artisan breads are cut with s knife.
They can be cut using an oiled knife before baking, or sliced post-bake. The oil on the knife prevents the bun from self-sealing when they are squished together to bake.
Post bake, there are special blades instruments, such as T-blades or Guitar blades, that poke into the center buns and slice through. The machines are calibrated so closely, that the center cuts stop a half centimeter from the edge of the middle buns. It’s enough to define the parting line that we see, and there’s not enough warm bread to reseal, hence the raggedy edge we sometimes get when eating hot dogs because we have to tear the bun open.
Basically, for you to do the same, you would need to bake 6 buns in a line. The middle buns, you would have to manually take a thin and sharp bread blade, and insert it length wise. Then, you’d slice to the side stopping *right* before you get to the end of that middle bun.
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