How to make marshmallow and chocolate cookies

• Mix butter with sugar.
  170 g butter, 200 g sugar
• Add the egg and egg yolk - mix.
  1 egg, 1 egg yolk
• Mix the flour with baking soda and add to the butter mixture - mix on low speed.
  270 g wheat flour, 3/4 teaspoon baking soda
• Add the chopped chocolate and mix - the dough will be more crumbly.
  100 g chocolate
• Cut the marshmallows in half with a sharp knife.
  12 pieces marshmallows
• Take heaped teaspoons of the dough, lightly press it in your hands, place a marshmallow in the center, and then lightly cover it with dough to form a ball with the marshmallow inside.
• Arrange the cookies on a baking sheet with spaces between them, as they will spread a bit during baking.
• Bake at 170 degrees Celsius (fan mode) for about 15 minutes - after 10 minutes, I swapped the baking sheets.
• Immediately after baking, the cookies are soft - that's how they should be - they will harden slightly as they cool.