Step 1

Place peeled and quartered potatoes in a large pot and add boiling water until the potatoes are just covered. Add salt and cover pot with lid.

Step 2

Heat pot on high heat until water comes back to a boil. Reduce heat to medium-high and boil potatoes for 20 minutes, until tender.

Step 3

Remove from heat and drain potatoes.Add the butter and mayonnaise to the cooked potatoes and using a hand held potato masher, mash the potatoes until they are velvety and smooth.

Step 4

Transfer potatoes to a large serving bowl, top with remaining butter and sprinkle with salt and pepper (if desired).