To the bowl of a stand-up mixer (alternatively, you can do this in a large bowl by hand), mix together the milk and active dry yeast. Allow to activate and get all foamy, about 8 minutes.: As the warm milk meets the yeast you will see tiny bubbles begin to appear on the surface, and within minutes a foamy, slightly yeasty aroma will rise, signaling active fermentation. This smell is delicate and slightly sweet, not unpleasant, and it tells you the yeast is alive and energetic. I always test the temperature of the milk with my wrist before adding yeast because water that is too hot will kill the organisms and leave no foam. A common mistake here is impatience, skipping the rest, and adding cold ingredients which slows activation; wait the full activation time for consistent rise.
Crack in the eggs and mix using a dough hook. If the egg yolks don’t break up, feel free to grab a fork and mix it all up until combined. Pour in the flour and salt. Mix together until mostly combined and then add in the cubed butter, one cube at a time until it comes together. Knead for about 5 minutes by hand or in the machine. The dough will be slightly sticky—that’s ok! Grease a bowl with oil or cooking spray and transfer the dough to the bowl, spraying or coating the top.: As you incorporate the eggs , the mixture will thicken and take on a slightly glossy sheen, and the beat of the dough hook will pull the dough together into a cohesive mass. The eggs add silkiness and aid in browning during baking, giving the rolls a warm golden hue. If the yolks remain whole, break them with a fork before mixing so you don’t end up with streaks. A common error is adding butter that is too soft too early, which can make the dough greasy rather than elastic.
Cover with a lid or clean kitchen towel and allow to rise for 30 minutes. It should be soft and supple; it’ll have risen by 50%.: When the flour is added, the dough will go from wet to shaggy, and you can hear it change pitch as it pulls away from the bowl sides. The salt tightens the gluten and sharpens flavor, so add it with the flour for even distribution. Knead for about 5 minutes by hand or in the machine until the dough becomes slightly tacky and smooth; the surface will feel supple but not sticky. Over kneading will make the dough too tight and result in dense rolls, so stop when the dough springs back gently to the touch.
You’ll need a high-powered blender for this. Think a BlendTec, Ninja or Vitamix. Add the freeze-dried strawberries and sugar to the blender. Blend on high for about 1 minute. It should end up looking like pink-colored powdered sugar. Let it settle before removing the top of the blender because it will create a 'smoke'. We’ll be using this for the filling and the frosting. Remove 3/4 cup of strawberry sugar and set aside. We'll be using this amount of 3/4 of a cup for the frosting.: As each cube melts into the dough you will notice a glossy, elastic texture forming and a rich, buttery scent. The gradual addition prevents the butter from breaking the dough, ensuring even incorporation. If the dough looks greasy, chill it briefly, then continue; that prevents separation. A typical pitfall is adding all the butter at once which can overwhelm the structure and lead to a greasy texture rather than a layered, tender crumb.
To the bowl of a stand-up mixer (with the paddle attachment) or using a medium bowl and a fork, add the butter, cocoa powder, vanilla extract and salt. Mix until it forms a paste that’s completely combined.: During this kneading the dough develops elasticity and a springy feel; you can hear a soft smack as the dough relaxes on the counter. It should be slightly tacky, not sticky, and when you stretch a small piece it forms a faint window without tearing immediately. This is the sign of good gluten development. If your dough tears readily, it needs a few more gentle folds. Avoid over kneading which will make the final rolls tight rather than airy.
Lightly flour your work surface and remove the dough from the bowl and place the dough into the center. Lightly flour your rolling pin and roll the dough into a 1/8-inch thick rectangle that measures 15' x 18'. If it’s not a perfect rectangle, that’s totally ok.: Once placed in a greased bowl the dough should sit with a lightly shiny surface; coating the top prevents a crust from forming. Cover with a towel and allow it to rise to about 50 percent larger, a soft, pillowy feel that gives under a fingertip. The smell becomes pleasantly yeasty and buttery. Rushing the rise or placing the dough in a drafty spot can slow or unevenly affect the proof.
Add the filling to the rectangle of dough, spreading it out into an even very thin layer, stopping from about 1/2-inch from the edges. Sprinkle the remaining/reserved strawberry sugar on top of the smoothed out chocolate.: During this rest the dough becomes noticeably airier and develops flavor from fermentation; the surface will show tiny bubbles and a gentle doming. I like to set mine in a warm corner away from drafts to ensure consistency. If your kitchen is cold, extend the rise slightly until you see the 50 percent increase, rather than sticking rigidly to the clock.
Roll the dough farthest from you, going toward you.: Adding the freeze dried strawberries and sugar to a high speed blender transforms them into a vivid pink powdered sugar within about a minute. When you remove the lid after blending, be prepared for a light dust plume that smells intensely of strawberry, and let it settle before opening fully. This preserved fruit powder is crucial because it gives concentrated fruit character without adding moisture. A common mistake is using a low power blender which leaves gritty pieces rather than a fine powder.
Using a serrated knife OR a piece of unflavored floss, trim off the ends. And then cut the log of dough into 12 equal pieces. Mine measured about to be 1 1/2-inches long. Transfer to a greased 9 x 13-inch baking pan or baking sheet. You can also use multiple baking dishes. Whichever works best for you.: The reserved strawberry sugar will be used to sweeten the frosting, providing a bright fruitiness that is both aromatic and flavorful. Measuring carefully ensures consistent sweetness for both filling and frosting. If you skip reserving the sugar you might run short for the frosting and lose that vivid strawberry presence.
Cover with a kitchen towel and allow to rise for an additional 45 minutes.: Mixing these into a paste creates a silky, slightly glossy filling with a rich chocolate aroma cut by vanilla. The texture should be spreadable and smooth, not crumbly. Properly combining produces a filling that glides across the rolled dough rather than tearing it. A typical mistake is not fully creaming the mixture which results in uneven pockets of dry cocoa powder .
Preheat the oven to 350 degrees F. Bake for 18 to 20 minutes, until puffy and lightly golden brown.: As you roll the dough out you will feel it relax and become more pliable; a light dusting of flour prevents sticking without drying the surface. The rectangle may not be perfect, but you want a roughly even thickness so rolls bake uniformly. If the dough resists rolling, let it rest for a few minutes to relax the gluten. Overflouring the surface can make the dough dry.
To the bowl of a stand-up mixer (or a large bowl) with the paddle attachment, beat together the cream cheese and the butter until smooth. Next, add the reserved 3/4 cup strawberry sugar, vanilla, pinch of kosher salt and heavy cream. Beat for a full 2 minutes until light and fluffy.: Rolling to the correct thinness creates many fine layers and makes each roll tender. You should see faint layering and feel a consistent thickness under your rolling pin. If the dough tears or retracts, it needs a short rest to relax. Work with gentle pressure to avoid compressing the bubbly structure formed during proofing.
When the rolls come out of the oven, pour half or all of the icing over the rolls and smother them with the icing.: Spread the chocolate butter mixture in a thin, even film so it melds into the dough as it bakes, creating a cohesive swirl. Leave the margin so the log seals cleanly when rolled. Then sprinkle the remaining reserved strawberry sugar over the smoothed chocolate, which will provide bursts of fruit and a slight crystalline texture. Overfilling or applying a thick layer will make rolling messy and may cause uneven baking.
Roll the dough farthest from you, going toward you: As you roll slowly and firmly, you will feel the dough compress into a tight spiral and hear a soft rustle from the layers sliding past one another. A steady, even roll ensures uniform spiral sizes; if you roll too fast you can trap air pockets. Use a bench scraper to help guide the edge if it slips.
Using a serrated knife OR a piece of unflavored floss, trim off the ends: Trimming creates neat rolls and removes any over compressed ends that might bake denser. Slicing with a serrated knife gives a clean cut, while floss allows a gentle sawing action that preserves the spiral. If your cuts are uneven, the smaller pieces will bake faster, so aim for uniform pieces to ensure even baking.
Cut the log of dough into 12 equal pieces: Aim for each piece to measure about 1 1/2 inches so they bake uniformly and yield a consistent portion. Transfer each cut roll into a greased 9 x 13 inch baking pan or spread across pans as needed. The rolls should sit slightly apart to allow expansion. Crowding the pan will inhibit even browning and proper rise.
Cover with a kitchen towel and allow to rise for an additional 45 minutes: During this second proof the rolls become noticeably puffed and jiggly, with a delicate dome forming. The aroma becomes richer and the dough feels pillowy. This step is critical for lightness; under proofed rolls will be dense, while over proofed rolls can collapse. Check for a gentle spring back when lightly pressed.
Preheat the oven to 350 degrees F: Preheating ensures the oven is at the right temperature so that the rolls set and rise properly, producing a light interior and lightly golden exterior. You will see steam escape and a sweet scent as the rolls bake; the tops will slowly take on a golden color. Baking at lower temperatures can make them dense, while too hot will darken the exterior before the center cooks.
Bake for 18 to 20 minutes, until puffy and lightly golden brown: While baking the aroma becomes richly buttery and slightly caramelized, and the tops should be a soft golden brown with the centers set but still tender. A light tap on a roll should sound slightly hollow and the internal crumb will feel springy. Overbaking dries them out, while underbaking leaves a gummy center; aim for the visual cues for best results.
To the bowl of a stand-up mixer (or a large bowl) with the paddle attachment, beat together the cream cheese and the butter until smooth: The cream cheese and room temperature butter will transform into a silky, pale base with a tangy aroma. Add the reserved 3/4 cup strawberry sugar, vanilla extract , a pinch of kosher salt and the heavy cream , then beat for two minutes until light and airy. The frosting should look whipped and billowy, and it should smell bright with strawberry. If the cream cheese is cold you may get lumps; be patient and bring it to room temperature for a smooth emulsion.
When the rolls come out of the oven, pour half or all of the icing over the rolls and smother them with the icing: As the warm rolls meet the chilled frosting you will see it soften and drape over each swirl, creating glossy ridges and pooling in the crevices. The contrast between warm bread and cool, tangy frosting is delightful, releasing steam perfumed with strawberry and butter. If you wait too long to frost, the icing will sit rather than melt in and create that signature glossy finish; if you frost too early, the frosting will melt away completely.