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| ●Instructions |  
|  Photo #1
 
  Photo #2
 
  Photo #3
 
 |  Add sugar to butter and cream together. 
 
  Add beaten egg yolk. Beat well until it emulsifies. (Photo #1) 
 
  Mix in sifted flour/cocoa powder mixture. (Photo #2) 
 
  Roll the dough, between the palms of your hands, into 5mm round and 10cm long pieces. 
 
  Join the ends of each piece to make a small ring. (Photo #3) 
 
  Bake in a preheated toaster oven at 160 °C (320 °F) for about 10 minutes. If the surface turns brown but the center is still not done, cover with foil and continue baking. 
 
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| Servings per Recipe | Calories per Serving | Ready In |  
| 5 | 25 cookies | 203kcal | 30 minutes |  |  
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| butter | 60g |  
| sugar | 40g |  
| egg yolk | 15g |  
| cake flour | 90g |  
| cocoa powder | 10g |  
| 【Preparation】 - Allow butter to soften at room temperature.
 - Sift together flour and cocoa powder.
 
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