Mix egg yolk and egg well with blender. Add sugar (vanilla), starch syrup, honey and salt and stir at high speed. If you support warm water underneath (medium bath, about 40 degrees Celsius), the foam will rise better.Stir until lightly browned. It depends on the blender, but it takes about 10 to 13 minutes.

Add a ladle of dough to (butter + fresh cream + oil) and mix well. If you mix the milk and milk in the batter as it is, the bubbles that you worked hard to make may subside, so you have to mix them separately.

Mix the dough in the dough. If possible, put the dough in a mold as if it were dropped from a high place, gently strike it a couple of times to drain the air, put it in a 180-degree oven, lower the temperature to 150-160 degrees for 10-15 minutes, and bake it for 30-35 minutes. It depends on the oven, so please adjust it. It tastes better if you wrap it well with plastic wrap or store it in an airtight container for more than a day.