Transfer mempool transactions from an online node to an offline node

So I'm doing this little experiment. What's the easiest way to get an online node's mempool over to an offline node? Is there any built-in feature in Bitcoin Core that lets you export and import the mempool without hassle? Or am I stuck going through each transaction in the mempool from the online node, saving them, and then importing them one by one on the offline node?

You may want to see these RPC call, https://bitcoincore.org/en/doc/28.0.0/rpc/blockchain/savemempool/ https://bitcoincore.org/en/doc/28.0.0/rpc/blockchain/importmempool/

Exactly what I was looking for!

How do you plan to use this on an offline node? I assume it's meant to create a new transaction: how do you do that?

It is not meant to create a new transaction, but to mine current ones.