Ingredients

  • 130 grams net weight Sweet potato
  • 60 grams Butter
  • 30 grams Sugar
  • 1 Egg
  • 100 grams Cake flour
  • 1/3 tsp Baking powder
  • 1 dash Cinnamon powder
  • 1 tbsp Cocoa powder
  • 20 grams Cake flour
  • 1 dash Water-dissolved egg yolk
  • 1 Black sesame seeds

Method

  • Thoroughly peel the sweet potato, cut into 2 cm cubes, and soak in water.
  • Add to a heat-resistant container, wrap, and microwave to soften.
  • While they're hot send through a strainer, cool, and set aside.
  • Leave out the butter at room temperature.
  • Add the butter to a bowl and use a whisk to whip into a cream.
  • Add the sugar in 3 parts and mix until it becomes white-ish.
  • Add the beaten egg a little at a time and mix.
  • Add the sweet potatoes and mix well.
  • Set aside 50 g of the dough in a different bowl (for making the cocoa dough).
  • Combine and sift the cake flour, baking powder, and cinnamon powder and add to the bowl in step 2.
  • Use a rubber spatula to mix well.
  • Once it's become a unified mass wrap it up and refrigerate for 30 minutes.
  • Now make the cocoa dough.
  • Combine and sift the cake flour and cocoa and add to the bowl you set aside in step 2.
  • Use a rubber spatula to mix well.
  • Once it's become a unified mass wrap it up and refrigerate for 30 minutes.
  • Take the dough from step 3 and make into a 15 cm round stick.
  • Place the cocoa dough on top of wrap, then another layer of wrap on top of the cocoa.
  • Use a rolling pin to thin it out.
  • Encase the sweet potato dough with the cocoa dough.
  • Wrap it up and cool in the freezer.
  • Remove from the freezer before it completely freezes (hard enough to be cut with a knife).
  • Cut diagonally into 5 mm slices.
  • Place on a baking pan, coat with water-dissolved egg yolk, and sprinkle with sesame.
  • Bake in your preheated oven at 170C for 20 to 25 minutes.