Click here if you only want the recipe without the discussion
Hartshorn a/k/a baker’s ammonia a/k/a ammonium carbonate a/k/a smelling salts is an old frenemy we recently studied in more detail. This was the chemical leavening agent from antiquity through medieval times and on into the 19th century, when it got replaced in most recipes by baking soda and powder. Why? Because it’s also known as “smelling salts,” and smells so foul that you can’t even nibble on dough samples before they bake. Not that I would ever do such a thing, but rumor has reached my ears… [Ahem]. The smell disappears during baking, but still. Who wants a product like that in their pantry where a spill can make your cat box seem friendly?
NOTE FROM KATE: You will only taste-test this dough once. At which point you will also spit the dough into the sink and reach for a glass of water. Yuck! The baked cookies, though, are as lovely and welcoming as they are versatile. Even better, they hold a basic shape and provide a lily-white canvas for any decorating ambitions.
In today’s age hartshorn has become a specialty leavener. And yet it is still around because it produces a different kind of rise than baking soda/powder; a lighter, crispier, more even texture that’s essential to recipes like Springerle, Swedish Drömmar, fine-featured molded gingerbreads, and texture-first specialties like Hungarian Kvircedli and Ammonia Crackers. Hartshorn has its flaws, but the upside can be spectacular.
Enter this cookie: Polish Ammonia Cookies (“Ciasteczka Amoniaczki”), which I hereby rechristen as Vanilla Puffs to reflect the remarkable effect of their magic ingredient. Plus variations like Peppermint Puffs, Anise Puffs, Lemon Puffs, etc. “Puffs” being the key word because that’s the closest I can come to describing the texture: a shatteringly crisp, sugary crust around an inside so pillowy and puffy that they have a universal appeal. Most cookies will have a few, recalcitrant protesters who just don’t get it. Everybody likes Ammonia Cookies. They may only be your third-favorite on the tray, but I can 100% guarantee they’ll be gone at least as fast as the ones you would choose for yourself.
Try this cookie and you will never again wonder why serious bakers remain willing to put up with hartshorn’s challenges. The cost is worth the payoff.
The Dough is Rough-Puff Pastry (A Flaky Cookie) In Disguise!
Want a laugh? I went through the whole recipe testing process on these with the niggling feeling that I knew the recipe from somewhere, even though I’ve never made anything like it. The penny dropped around five minutes ago.
The niggling finally got bad enough for me to run back to Volume I for a scan of the ratio tables at the start of each chapter. And sure enough, there it was. The proportions of flour, butter, sour cream, and sugar are an all but perfect match to flaky cookies made from our Faux Puff Pastry recipe (a/k/a “rough puff”). The only real differences are the handling and the addition of a massive amount of hartshorn.
You make rough-puff dough by cutting butter into a combination of flour and a small amount of sugar, in order to achieve the “pebbly” texture of a piecrust with extra-large butter chunks. Then, instead of cutting it finer, as you would for that piecrust, you roll the dough out in a few “envelope turns” before finally rolling-and-cutting your cookie shapes. It’s a minor P.I.T.A., yes, but much easier than the major P.I.T.A. of traditional puff pastry.
This dough? Just cut the butter down to piecrust-texture in a food processor, include a generous amount of hartshorn, and presto! Something that tastes like puff pastry, and has a crispy outside, but has the pillowy interior you can only achieve with baker’s ammonia.
The Sugar Crust
There’s a pretty well established pattern for flaky cookies of all types:
- Palmiers a/k/a Elephant Ears? Roll out some puff pastry (or other flaky-cookie dough), coat it generously with cinnamon sugar, roll it back into a tube like a jelly roll a/k/a roulade, and then slice-and-bake.
- Dutch Krakelingen? Cut off strips of that same dough, roll in cinnamon sugar, and then shape them into pretzels before baking.
- Rugelach? Do the jelly roll thing with a layer inside made from a fruit-and-nut filling, and then coat with cinnamon sugar before baking.
- Goose Feet a/k/a “Gusine Tlapki”? Roll, sprinkle with spice-sugar (not necessarily cinnamon), and then cut out large circles which you fold into quarters.
- Kolache? Roll, cut out squares, dab with fruit filling, fold up two corners, and then sprinkle with plain sugar.
Get it? Ammonia Cookies aren’t any different except you (a) can readily flavor the dough, and (b) can roll-and-cut any shape of cookie, and (c) should, not just can, coat the outside in sugar alone. The snowy, extra-crunchy outer crust is part of the experience.
We did test cinnamon sugar in case you’re wondering, and it works perfectly well, but it also standardizes the whole experience. Both Kate and I preferred these with sugar alone.
The Baking and Fumigation Times
The flaky cookies listed above typically bake at 350° F (175° C) for about 15 minutes, give or take according to thickness. Ammonia Cookies work a little better if you cook them at the same temperature for only 12-13 minutes. The shorter baking time helps to preserve that pillowy interior, whereas the flaky cookies want to emphasize their crispness.
The combination of a moist dough and a shorter baking time can cause a problem, however: a residual whiff of ammonia left over in the baked cookies, even after they cool. It usually isn’t all that strong, and it only happens about 75% of the time, but that’s still an issue you need to keep in mind.
The solution couldn’t be easier. Leave the baked cookies out for an hour or two. That should be all it takes for the dissolved ammonia gas to dissipate into the air. If they were really bad? Still simple. Wait a little longer.
Hartshorn giveth, and hartshorn taketh away.
The Cut Outs
Ammonia cookies work with almost any basic shape, but expand too much for anything with features. I tested stars, hearts, circles, a mushroom shape, fluted ovals, snowmen, and a Christmas ornament shape. Everything worked except the ornaments, snowman, and the fluted ovals. Those could still be recognized by someone who knew what they were supposed to be, but they lost the outside details that make them more than just shapes.
Feel Free To Customize!
Do some research on cookies made with hartshorn and these basic proportions. You will quickly find several much loved variations. These include:
- Peppermint Ammonia Cookies (add in peppermint oil), which are very popular in the American Midwest, and generally attributed to German immigrants;
- Anise Ammonia Cookies (add in anise oil), same thing with what seems to be inspiration as much as tradition;
- Ginger Ammonia Cookies (add in a generous amount of dried ginger), with some optional extras for those who want to try a popular Slovak variation.
We tested all of the above, and they all worked just as well as the standard vanilla version. I’ve no reason to believe other spices wouldn’t be just as good. These may be my new favorite when it comes to featuring one particular flavor.
FWIW, our 2024 Christmas tray is going to include the Peppermint version because we have nothing else even close to that flavor profile, and I may throw in a few vanilla ones too. Not that a spice version will find any protesters. Hmmm…
Can You Simply Put The Sugar In The Dough?
We tried it, and the answer is “Yes.” The cookie works fine. But we really like the showy, snowy white crust that comes from following the recipe, and it enhances that wonderful contrast between the inside and outside. The most I would actually recommend is the addition of something to show an inside flavor. Perhaps some anise seeds, or some bits of peppermint-green sugar.
Those flavored versions carry a significant odor, but who wants to eat the cookie I just sniffed and then put back on the tray?
Sour Cream? Is That Traditional?
Is it fair to answer that with a “Yes, but…?” Sour cream per se has been around for most of human history. After all, the root definition is nothing more than fermented cream. Some say it traces back to the Mongol hordes that made kumiss from mare’s milk, but I personally find that hard to believe. Not because the Mongols didn’t do just that, and helped to spread the idea. I just doubt that no one in human history came up with such an obvious idea before that. It certainly predates the arrival of Europeans in the new world.
I won’t speculate about the reasons, but research shows that sour cream has always been more common in central and Eastern Europe than over by the Atlantic. This enters into the history with the great migrations of Czechs, Poles, Slovaks, Germans, etc. into the U.S. from the mid 1800’s on. They brought sour cream with them, where it met the rising force of the Industrial Revolution and morphed.
What had been a hand crafted, fairly regional staple became an industrially produced, properly pasteurized dairy product sold in every market across the land. Dips made with sour cream became a capital-T Thing. Baked potatoes began to look naked without it. Mexicans used it every bit as much. And it became a common, if relatively minor ingredient in the baking repertoire of the North American continent. At which point it traveled back to Europe, and began to expand in the old world too.
You will note that we call this a Polish cookie (“amoniaczki”), because that seems to be ground central for where it is enjoyed in Europe, and was such a major part of the immigrant population that filled the American midwest, where this cookie centers in North America. So… did the original European version use sour cream, or was it a case of American ingenuity improving on the original, which then made its way back to Poland along with industrial production?
I cannot answer that. I can only confirm that European variants using eggs instead of sour cream are easy to find; that we tested them; and that sour cream is definitely the way to go. It just works better.
Can I use Baking Powder or Soda For Convenience?
We liked this cookie so much that I felt compelled to test this, and the answer is, “Only if you must.” Texture is major part of this cookie’s appeal. The baking powder ones looked okay, and tasted fine, but they simply weren’t the same. The almost-crispy crust diminished down to a mere sugar-crust, and the exciting fluff-honeycomb interior became a standard, soft one.
Would we make them in a pinch using baking powder or soda? Hmmm. I suppose we might. Particularly if we wanted a softer cookie with a distinctly clear peppermint or anise note. But to be honest, we would only do it as a giveaway cookie because now that we’ve had the real thing, they would be too disappointing for either of us to really enjoy.
Conclusion
This is a fun cookie. Kate got a bit old grin on her face at the first bite, and said “It tastes like a hug!” I had to agree. But it’s not a hug from your Grandma, or spouse, or parent, or child. Nor anyone else you deeply love. Those have too much emotional freight. Ammonia Cookies are a hug from that friend you’re meeting for lunch, or one of your daughter’s little playmates.
Simple, companionable, and yet somehow special at the same time – from both a baker’s perspective, and a human one. And that’s just the vanilla version. The cookie’s flexibility as a base for other and custom creations only makes it that much better.
Enjoy!
