Add minutes contained in a column to a date

In CartoDB I want to add minutes contained in a column of data type number to a date.
e.g.

SELECT my_initial_date + ‘xx minute’::INTERVAL as my_date FROM table

What is working is:

SELECT my_initial_date + '7 minute'::INTERVAL as my_date FROM table

This adds 7 minutes to each my_initial_date.
What I want to do is the same but with a variable number of minutes stored in another column, e.g.:

SELECT my_initial_date + 'column_name minute'::INTERVAL as my_date FROM table

This doesn’t work in CartoDB! How to do this?