In the bowl of a stand mixer (or in a large bowl, by hand if you prefer!), combine your active potato flake starter, all purpose flour, sugar, warm water, salt, and melted coconut oil.

Knead with the dough hook attachment until the dough pulls away from the sides of the bowl and becomes a soft silky dough.

It should take about 10-15 mins total, start at low speed until all the ingredients are incorporated, and then increase to medium speed. It will look very wet and sticky for a while, but this dough will come together with continued kneading.

Place this dough into a greased bowl, cover it with plastic wrap, and let it ferment in a warm spot for about 8–12 hours. Dough rise times can vary but it should double in size.

Once the dough has doubled, refrigerate the dough for at least 2 hours up to 48 hours. Having a cold dough makes the shaping much easier. You could skip the refrigeration step, but your dough might be a little sticky. You will get the best results when shaping if you can chill the dough first.

You can roll the dough out while it’s still chilled — this actually helps keep the heart shape cleaner.

Prepare a baking pan by lining with parchment paper and brushing butter on the sides. I used a round pie dish. This was perfect for the heart shapes, but you could use any pan you have available. This recipe should make 2 round pans with 6 rolls each.

My photos show more rolls in one dish, but I found it works best to give them more space and remove the center roll so the heart points don’t get squished.

Once your dough has doubled, turn it out onto a clean work surface. Only use a lightly floured surface if the dough is unmanageable. Having a slightly tacky dough helps hold its shape when rolling it out. It is also helpful to keep the heart shape better. Before rolling, press it into a large rectangle with your hands shaping it into the rectangular shape before beginning the rolling is helpful to get the most symmetrical shape. Lightly oil your rolling pin and begin rolling your dough out until you have about a 13"x18" rectangle.

Melt the butter and brush it over the entire surface of the dough, right up to the edges.

Then sprinkle the sugar and cinnamon evenly across the top. The butter should soak up the butter and cinnamon some but there shouldn't be too much butter which could cause it to leak.

Using your pizza cutter or sharp knife, start on the long side of the dough and cut the dough into 12 even strips, making vertical cuts parallel to the short sides of the dough. Each strip should be about 1½ inches wide.

Take one strip and gently roll each end inward toward the center, stopping when the two rolled ends are about 1–2 inches apart.

Carefully pick up the roll and bring the two rolled ends together so they just touch. The unrolled center section will naturally dip slightly.

Shape that unrolled portion into a soft “V” to create the point at the bottom of the heart.

Place each heart into a greased baking dish, leaving a little space between them so they have room to rise and puff up beautifully.

Cover your shaped hearts and let them rise again until they’ve risen some and are puffy, they will rise more in the oven. This takes about 5-8 hours, but rise time depends a lot on your room temperature and strength of the potato flake sourdough starter.

Once your hearts are nice and puffy, drizzle about 1/2 cup of heavy cream or milk over the tops of them in the dish — this step makes them extra gooey and tender. Bake in a 350°F oven for about 25 minutes or until golden brown. You can also check the internal temperature to check for doneness. It should reach 190°F to be fully baked.

While they’re baking, whisk together your powdered sugar, milk, butter, and vanilla extract into a smooth icing.

Once your rolls are out and slightly cooled, drizzle or spread that sweet icing over the tops. Avoiding adding too much icing and covering up the heart rolls, you want a thinner glaze that will show the beautiful shape.

Quickly sprinkle with Valentine's Day themed sprinkles before the icing begins to harden. This is optional but I think it adds more to the festivities!