In an Instagram video, Flay notes he hasn't had a McDonald's Shamrock Shake "since 1972," but after watching the HBO miniseries, "McMillions," he felt inspired.

The McDonald’s Shamrock Shake is a customer favorite, but you can also make this sweet treat at home. This recipe from Kitchen Fun with My Three Sons is a simple ...

The McDonald’s Shamrock Shake is a customer favorite, but you can also make this sweet treat at home. This recipe from Kitchen Fun with My Three Sons is a simple and delicious copycat version ...

The McDonald’s Shamrock Shake is a customer favorite, but you can also make this sweet treat at home. This recipe from Kitchen Fun with My Three Sons is a simple and delicious copycat version ...

The McDonald’s Shamrock Shake is a customer favorite, but you can also make this sweet treat at home. This recipe from Kitchen Fun with My Three Sons is a simple Copycat McDonald’s Shamrock Shake ...

McDonald's: Courtesy of Brand. Recipe photo: Casey Barber. EatingWell design. Although Punxsutawney Phil did not see his shadow, declaring six more weeks of winter, McDonald’s just brought back ...

26 Shamrock-Themed Recipes For St. Patrick's Day—From Cake, Pasta, ... and what is a better day than to get together with your friends and family over a glass of shamrock shake, ...

The McDonald’s Shamrock Shake is a customer favorite, but you can also make this sweet treat at home. This recipe from Kitchen Fun with My Three Sons is a simple ...

The McDonald’s Shamrock Shake is a customer favorite, but you can also make this sweet treat at home. This recipe from Kitchen Fun with My Three Sons is a simple and delicious copycat version ...