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Sweet Bread

Czech Filled Donuts Koblihy

15 donuts
Vegetarian Diet, Czech Deep Frying

Dive into making Czech Filled Donuts Koblihy, a popular Czech pastry enjoyed year-round. Known for their soft, pillowy dough, these treats are typically filled with fruit preserves, though variations with vanilla or chocolate pastry cream are also enjoyed. Unlike treats reserved for special occasions, these delightful filled donuts are a...

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... common indulgence in Czech bakeries and homes.

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Tom the Chef Tom the Chef Founder
December 29, 2025
Czech Filled Donut kobliha on the black tray in the detail side shot with kitchen in the background
  • 30 min.
  • 3 h.
  • 3/5
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Ingredients:

Dough:

Filling:

Optional Glaze:

* Cut butter into small pieces before melting and place into a measuring pitcher (or small microwavable mixing bowl). Then, microwave briefly with a few seconds break between – to prevent little “explosions.” Optionally, melt the butter over low heat with occasional whisking.

Tools:

Directions:

Koblihy Donuts Common Steps-02

1. Dough:

Let’s start preparing the Czech filled donuts Koblihy with the dough preparation.

1.1. Place into a kitchen mixer with a hook attachment:

4 cups of bread flour
½ cup of granulated sugar
1 TBSP of active dry yeasts
Pinch of salt

Briefly stir with a whisk just enough to combine all ingredients (about 1 minute).

Koblihy Donuts Common Steps-04

1.2. Add:

1 cup of lukewarm milk
1 stick of butter – melted
3 eggs

Knead on low speed until all ingredients are partially incorporated (about 1 – 2 minutes).

Koblihy Donuts Common Steps-01

1.3.

Then increase the speed to medium-high and knead until a sticky dough is formed (about 3 – 4 minutes).

Koblihy Donuts Common Steps-13Koblihy Donuts Common Steps-14

2. Raising the Dough:

2.1.

Remove the bowl from the mixer and cover with plate or plastic wrap.

2.2.

Let it rise in a warm place until it has at least doubled in size (about 2 – 3 hours).

Koblihy Donuts Common Steps-15

3. Shaping:

Note:
Work on a lightly floured surface

3.1. Place the dough on a floured surface and, using a rolling pin, flatten the dough to about ½” thickness.

Tips:

  • If the dough sticks to the rolling pin, consider gently flouring the top.
  • If the dough is generally to sticky, consider incorporating some flour into the dough. You can do it by using a kitchen mixer or your hands.
Koblihy Donuts Common Steps-16Koblihy Donuts Common Steps-17Koblihy Donuts Common Steps-19Koblihy Donuts Common Steps-18

3.2. Cut each donut and donut hole by using a 3” cookie cutter.

Note: Czech filled donuts, koblihy, do not have a donut hole.

Koblihy Donuts Common Steps-20Koblihy Donuts Common Steps-21

3.3.

Place it on a lightly floured baking sheet and repeat with the remaining dough.

Koblihy Czech Donuts Steps Only-01

3.4. Form the leftover dough together with your hands and roll it again with a rolling pin. Then, cut more donuts.

Tip:

To make the process easier, you can simply fry the scraps instead (the shape will be off, but they will still taste delicious). Alternatively, you can reform the dough and then cut non-traditional Czech long johns to make the process with reformed dough easier.

Koblihy Donuts Common Steps-22Koblihy Donuts Common Steps-23Koblihy Donuts Common Steps-24Koblihy Donuts Common Steps-25

4. Proofing and Oil Preheating:

4.1. Let the donuts proof in a warm place for about 30 minutes or at room temperature for about 45 minutes.

Note:
You are not looking for any specific volume increase; you just want to give the dough an opportunity to recover.

4.2. Set your oil to preheat to 320°F.

Important:
Carefully monitor the oil temperature. If the oil reaches a higher temperature (usually over 400°F), it becomes flammable.

Koblihy Donuts Common Steps-29

5. Filling Preparation:

5.1.

While the donuts are proofing, prepare the filling.

5.2. Fill a pastry bag fitted with a Bismarck tip with the preserve or jelly, or prepare the pastry cream and fill a pastry bag, so they are ready to fill the donuts soon after frying.

Recipe for Vanilla Pastry Cream for Filling Pastry here
Recipe for Chocolate Pastry Cream for Filling Pastry here.

Kitchen Guide

Deep Frying

October 17, 2023

Deep frying is a very popular cooking method. Unfortunately, it is also considered unhealthy since deep fried food represents higher calorie intake when compared to non-fried food. With frequent consumption it can lead to unwanted weight gain. Even though deep frying sounds for some people almost scary, it is simply submerging food in hot oil which leads to instantly cooking the surface while moisture is trapped in the food and keeps cooking the food from the inside.

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Tom the Chef Tom the Chef Founder

6. Fry:

Note:
Fry donuts in batches based on the size of your deep fryer (or pot).

6.1. Place each donut carefully into the preheated hot oil by hand.

Tip:
If you find this task too complicated, you can optionally use a slotted turner to place the donuts in.

Koblihy Czech Donuts Steps Only-02Koblihy Czech Donuts Steps Only-03

6.2.

Fry until a nice color is reached (about 2 – 3 minutes).

6.3.

Turn and fry until the second side reaches a nice color (another 1 – 3 minutes).

Koblihy Czech Donuts Steps Only-04Koblihy Czech Donuts Steps Only-05

6.4.

Carefully remove from the hot oil and transfer to the cooling rack or paper towel to let the oil drain off.

Koblihy Czech Donuts Steps Only-06

6.5.

Repeat with the remaining donuts.

7. Optionally Prepare Glaze:

7.1. Place all ingredients into a medium mixing bowl:

2 cups of confectioners’ sugar
3 – 5 TBSP of water
2 TSBP of vanilla extract
Optional: food coloring (follow the package’s instructions)

Thoroughly stir together with a whisk until fully incorporated (about 30 seconds).

Tip:
Work one by one, and after finishing the first one, try to determine if the glaze thickness meets your expectations. If you then find out that you would prefer a thicker glaze, simply stir in some confectioners’ sugar. If you then find out that you would like a thinner glaze, simply stir in some water.

Koblihy Donuts Common Steps-27Koblihy Donuts Common Steps-28

8. Fill and Optionally Glaze Czech Filled Donuts Koblihy:

Important:
Continue with the following steps once all the doughnuts are cool enough to touch. The donuts need to be glazed and filled while still warm – work quickly.

8.1.

Fill Donuts:

8.1.1.

Insert the pastry tip into the side of the donut, aiming for approximately the middle, and then pipe in a portion of the filling.

Koblihy Czech Donuts Steps Only-07

8.1.2.

Repeat with the remaining donuts.

8.2.

Optional Glazing:

8.2.1.

Take each and place it into the glaze.

Koblihy Czech Donuts Steps Only-08Koblihy Czech Donuts Steps Only-10

8.2.2.

Let it sit in the glaze for a few seconds.

8.2.3.

Slowly take it out and let part of the glaze drip for a few seconds before turning.

Koblihy Czech Donuts Steps Only-09

8.2.4.

Then, place it on the baking sheet or plate.

8.2.5.

For the best results, let the glaze harden at room temperature before serving (usually about 10 – 15 minutes).

About the Author:
Tom the ChefFounder
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