Start with the right ingredients
In order to make art on your latte or cappuccino, you have to start with fresh espresso and just-steamed, microfoamed milk. For tips on steaming milk, check out the instructions here.
The first step of pouring any type of latte art is to "sink" the first bit of milk underneath the coffee, in order to form a kind of foundation. To do this, start by pouring your just-foamed milk from slightly high above the cup (two to three inches) in a slow and steady stream about the thickness of a mouse's tail.
No white should appear on top of the coffee yet. Continue to pour slowly until the cup is about a third full.
Once your cup is about a third full with milk and coffee, bring your pitcher down until it touches the side of the mug, and increase the volume of milk flowing out of your pitcher. (You should go from a mouse's tail to something more like an opossum's tail. Sort of.)
By bringing the pitcher down closer to the coffee and pouring a bit faster, you'll be able to start coaxing the foam that will create your design out of the back of your pitcher. You should see a dot of white start forming on the top of the coffee at this point, and it should expand outward as you pour more.
Continue pouring more milk out until the dot is roughly the size you want for the heart and the cup is mostly full. Then lighten up the volume of milk you're pouring, and move the pitcher forward toward the far edge of the mug. Dragging through the diameter of the circle draws a divot into the top (to create the "bumps" of the heart), and pouring a thin stream through the bottom of the circle creates the point.
Who needs Russell Stover?
You're done, congrats! You win instant love points! Present this to your coffee-loving cuddle bunny to kick off the perfect Valentine's Day.