The best thing you can do is take your dough out of the fridge and leave it at room temperature for around an hour or until there's no longer a chill to it. Once the dough gets warmer, the gluten will become more relaxed and you should be able to easily stretch it to your desired size.
In respect to this, how do I make my dough stretch again?
The best way to stretch your dough is to grab one part of the side with both hands and let the rest of it flop down in front of you. Gravity will gently stretch the dough downward.
Beside above, how do you fix runny dough? Even if you didn't add double the amount of milk to the dough, runny dough is often caused by too much liquid. This means that using an ingredient that counteracts that liquid should make your cookie dough thicker than it currently is. The best ingredient to use in this situation is going to be flour.
Hereof, can you fix Overworked dough?
If you think you've over-kneaded the dough, try letting it rise a little longer before shaping it. You can't really undo the damage of over-worked gluten, but the longer rise can get the dough to relax a little. Loaves made with over-kneaded dough often end up with a rock-hard crust and a dense, dry interior.
Why is my dough not stretching?
Tight gluten is the most common cause of dough that's difficult to stretch. When gluten is tight, it's very elastic so it springs back easily. Get your dough to room temperature before you work with it and let it relax for 15 minutes if it feels too tight.