Whisk together the melted butter and sugars in a medium-sized bowl until creamy and well blended. Mix in the flour, cocoa powder and salt, beating to combine. Add in the cream cheese and mix until well blended; pour in the yogurt and red colouring. Mix until well blended. Fold the chocolate chips through and mix until smooth and creamy.: The bowl will pick up a warm, buttery scent as you stir, and the sugars will begin to dissolve into the butter , creating a glossy, slightly grainy mixture. Use a wooden spoon or sturdy whisk and scrape the sides so nothing clings, because pockets of dry sugar can lead to unevenly sweetened dough. If your butter is too hot it can melt the brown sugar excessively and alter texture, so let the butter cool briefly until warm not hot. A common mistake is rushing while the butter is scalding, which can make the dough greasy, rather than tender.
Pour into a lined loaf tin and prepare cream cheese swirl:: As you add the dry flour , sift the cocoa powder if it is lumpy so the color stays even, and the mixture will thicken and become more dough like. You should notice a faint chocolate aroma emerge, and the texture should shift from glossy to pliable. Stir until just combined, because overworking will activate gluten in the flour and can make bits tough in the cold. Watch for any streaks of dry flour ; they mean you need a few more gentle stirs but stop before the dough tightens.
Combine the cream cheese, yogurt, sugar and vanilla paste, mixing well until smooth and creamy. Pour the cream cheese mixture over the red velvet mixture and swirl through the red velvet.: The softer spoonfuls of reduced fat cream cheese will make the dough silkier, and you should see small creamed pockets disappear as you beat. When you pour in the stated amount of non fat Greek yogurt and drop in the red food colouring , the mixture takes on that signature hue and creamy consistency. Stir gently so you keep the color even and avoid splashing. A troubleshooting note, if the color looks patchy add the color in small increments until uniform, but avoid over coloring which can affect flavor.
Freeze for over 4 hours or until set.: At this point the aroma becomes a mix of tang and cocoa, and the visual should be consistently red without streaks. The texture will be thick yet pourable, like a dense batter. If you notice separation, give it a few more gentle stirs; persistent separation can come from cold ingredients, so allow them to warm slightly to room temperature before beating. Avoid vigorous beating, which traps air and can cause icy texture when frozen.
Remove from freezer for about 10 minutes before serving!: Folding in the chocolate chips should be done with a spatula, using wide scoops so the chips distribute evenly without breaking. When you finish, the mixture will have tiny bites of chocolate dotting the red canvas, adding snap when you scoop it later. If you mix too aggressively the chips can clump at the bottom, so fold gently and scrape the bowl all the way down to capture any chips hiding there.
Pour into a lined loaf tin and prepare cream cheese swirl: Pour the red velvet mixture into a lined loaf tin, noticing how it settles with a glossy surface. The lining makes release effortless after freezing. While the base rests in the tin, gather the cream cheese swirl ingredients; this parallel work keeps things efficient and ensures the swirl is fresh and pourable. A typical misstep is waiting too long and having the base start to freeze unevenly, so move promptly to prepare the swirl.
Combine the cream cheese, yogurt, sugar and vanilla paste, mixing well until smooth and creamy: Beat the larger portion of softened reduced fat cream cheese with the additional non fat Greek yogurt , the smaller sugar measure, and the Vanilla Bean Paste until velvety. You will see tiny vanilla specks and the aroma will turn warm and fragrant. This mixture should be lump free; if you see curds, keep beating at low speed. Overbeating can incorporate too much air which may affect the swirl texture once frozen, so aim for smooth and dense rather than foamy.
Pour the cream cheese mixture over the red velvet mixture and swirl through the red velvet: Dollop the creamy swirl on top in spoonfuls then use a knife or spatula to create loose swirls so that the two components remain distinct yet marbled. The visual swirl should show veins of white against the red, promising contrast in each scoop. If you over swirl, the two layers will fully combine and you will lose the ribboned effect; swirl modestly for the best look and texture.
Freeze for over 4 hours or until set: The freezing step is when the texture transforms. After about four hours the center should be firm but scoopable, with the edges solid. The aroma will be muted, and the texture should be dense yet creamy, not icy. A common error is trying to speed this by setting the freezer to an extreme cold setting which can freeze the mixture rock hard; keep the normal freezer temperature and allow time, which yields a smoother mouthfeel.
Remove from freezer for about 10 minutes before serving: Allowing the container to sit at room temperature for about ten minutes softens the top and makes scooping effortless, revealing the marbled cross sections and shining chocolate chips . You will notice softer edges and a creamy scoop texture. If you skip this rest, your scoops may be crumbly and the flavors less expressive, so a short wait pays off in presentation and taste.