For this guide you will need a One2 Menu account. Please sign up for an account using this link if you don't have an account.
One2 Menu is designed to give you easy management over your menu and replaces the default Squarespace "Menu" block.
To add One2 Menu, just pick the black "add" pin on the left side of an empty section on your page. Navigate down to the Code block and click enter.
Please note, you will need a business account to use this feature.
Next, open One2 Menu. Under the account icon, click Settings (1) and copy the embed code (2).
Paste the embed code back into the Squarespace embed frame.
Congratulations! You may need to publish your Squarespace website to see the One2 Menu live on your page.