Add the melted butter, applesauce, sugar, eggs, and vanilla to a large bowl. Then whisk until everything is well combined.

Next, add the flour and baking soda. Mix just until no dry flour remains and a very thick batter forms.

Then heat a lightly oiled pan over medium-high heat. Let the pan warm up before adding the batter.

Scoop the batter into the pan using a spoon or ice cream scoop.

Then gently flatten each portion with your fingers or the back of an oiled spoon.

Cook for about 5 minutes, or until the bottom is golden and firm.

Then flip and cook the other side for about 5 minutes, watching closely so it does not burn.

Lastly, remove the cookies from the pan and let them cool slightly.

Serve warm or at room temperature.