Creamy Dream: Just 5 ingredients. I make this when I want a dessert that melts in your mouth and practically cooks itself.

Prepare the slow cooker: Lightly grease the bottom and sides of a 4- to 6-quart slow cooker crock with a thin film of butter or neutral oil. This helps keep the cake from sticking and makes it easier to lift out or serve directly from the crock.

Slice the sponge cake: Cut the sponge or pound cake into 1-inch thick slices. If your cake is very tall, you can also cut the slices in half crosswise to create smaller pieces that fit more easily in the slow cooker.

Arrange the cake in the crock: Lay the cake slices in the slow cooker in a single snug layer, breaking pieces as needed to cover the bottom. It’s fine if they overlap slightly or you have to tuck in smaller pieces; the goal is an even, porous layer that will soak up the milk mixture.

Mix the tres leches: In a medium bowl, whisk together the whole milk, sweetened condensed milk, evaporated milk, and vanilla extract until smooth and fully combined. The mixture should look pale and slightly thick from the condensed milk.

Soak the cake: Slowly pour the milk mixture evenly over the arranged cake slices, making sure to cover all exposed areas. Gently press down on the cake with the back of a spoon or a spatula so it starts to absorb the liquid. The cake will look very saturated—that’s what you want for that melt-in-your-mouth texture.

Cook low and slow: Cover the slow cooker with its lid and cook on LOW for 2 to 3 hours. Begin checking around the 2-hour mark. The cake is done when it has visibly swollen, looks glossy and custardy, and most of the liquid is absorbed but there is still a little pooled around the edges. The surface should feel very soft but not soupy in the center.

Rest and set: Turn off the slow cooker, remove the lid, and let the cake rest in the warm crock for at least 20 to 30 minutes. This resting time allows the remaining liquid to redistribute and fully soak into the porous crumb, giving you that moist, glistening texture.

Serve: Scoop the warm tres leches cake directly from the slow cooker into small bowls, making sure each portion gets some of the creamy milk from the bottom. If you prefer a firmer, chilled dessert, cool the crock to room temperature, cover, and refrigerate for at least 2 hours or up to overnight before serving.