(A sweet) message in a bottle

Remember the glass jars in this post? They are Weck canning jars. Weck jars are the German equivalent to American Mason jars, the only difference is that Weck jars have glass lids and rubber rings. Usually these jars are used for home canning and preserving fruit, vegetables, jams, and jellies. But you can also use special Weck glasses to bake and preserve cakes.

A couple of weeks ago I ordered 6 of the 1/2 litre jars for preserving cakes. They say that you can store your cakes in these jars for up to 6 months, but I guess mine will last only a couple of days.

[This picture shows the cake right after it was removed from the jar. The flour, which prevents the cake from sticking to the glass jar, can be removed easily.]

Hazelnut Cakes with Marzipan and Chocolate (for two jar cakes)

1 1/4 cups flour
1 t baking powder
1 pinch salt
3 1/3 T melted coconut fat (or margarine)
3 T soy yoghurt
1 t vanilla extract
1/2 t almond extract
3/4 cup brown sugar
6 T freshly brewed, strong coffee
1/2 cup chopped hazelnuts
1/2 ritter sport marzipan chocolate bar (1.8 oz) or regular semisweet chocolate, chopped.

Combine flour, baking powder, sugar, and salt in a bowl. In a second bowl, mix coconut fat, yoghurt, extracts, and coffee. Pour wet into dry ingredients and stir to combine. Fold in nuts and chocolate.

Preheat oven to 350°F.

Grease the canning jars and flour them. Divide batter between two 1/2 litre jars. Fill the jars only halfway full. Bake them below the middle rack for 30-35 minutes, or until an inserted toothpick comes out clean.

Meanwhile put the glas lids and rubber rings (only if you have Weck glasses) in hot water. When the cakes are done, seal them immediately with a wet rubber ring, the  dry lid, and secure with 2-3 canning clamps. Before you do this, please make sure that the glass rims are completely clean. Handle the hot glasses with great care.

If you use other glasses than weck, follow the manufacturers instructions for canning. (Canning these cakes works exactly like canning fruit or vegetables.) Let the glasses cool completely. The vacuum which makes the preserving possible will develop while cooling down. For more information on canning cakes, you can also find some useful information here.


25 thoughts on “(A sweet) message in a bottle

  1. this sounds so neat and that cake sounds so good. It makes sense that canned cake works well as you can buy canned brown bread. I want to try this.

  2. Sanja, it doesn’t work with every glass as you will have problems to remove the cake from the jar. The most important thing is to use a straight jar, so that the cakes can easily be removed.
    shellyfish – Holiday gifts sound like an awesome idea!

  3. I’m so excited you tried this! I have about four sites bookmarked where they explain how to do this – I want to try it for holiday gifts for people. I’ll let you know how it goes!

  4. you come up with the coolest ideas, Mihl! I loved seeing words in German in your latest comment to me too. hooray!

  5. Wow, that’s a really fantastic idea, not to mention how delicious the cake looks. I think I might have to use this as an excuse to get some new jars.

  6. That is so cool! Do you think it will work in any Weck glasses? Probably not because you can’t remove the lids? Awesome idea. That cake looks delicious! It would make such a great gift… Are these the ones from the ‘mold’ line?

  7. that is so unusual! i never thought of canning baked goods! i just throw em in the freezer if i need to…but i never need to because everything is eaten within 24 hours in my house!!

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