👩🍳 Instructions
1️⃣ Make the Cake
- In a saucepan, melt butter with the hot espresso and cocoa powder over medium heat. Stir until smooth and glossy.
- Mix in the sugar and stir until dissolved. Remove from heat and let cool slightly.
- In a large bowl, whisk together the flour, baking soda, baking powder, and salt.
- Pour the warm espresso mixture into the dry ingredients and stir to combine.
- Add eggs, sour cream, and vanilla extract to the mixture, and mix until you have a thick, velvety batter.
- Spread the batter evenly into a greased baking pan (9×13 inches recommended).
- Bake at 350°F (175°C) for about 25–30 minutes, or until the center is just set and soft, slightly gooey, and fragrant. A toothpick inserted into the center should come out with some moist crumbs.
2️⃣ Add the Marshmallow Layer
- While the cake is still warm, scatter the mini marshmallows across the top. They will begin to soften and melt into the cake’s surface.
3️⃣ Make the Mud Glaze
- In a saucepan, melt butter with cocoa powder and espresso over medium heat.
- Once melted, whisk in the powdered sugar and vanilla extract until smooth and pourable.
- Pour the warm glaze over the marshmallows, allowing it to melt and swirl into the marshmallows to create a gooey, shiny « mud » topping.
4️⃣ Serve
- Slice the cake while still slightly warm so the marshmallow topping stretches softly with each piece.
- Serve and enjoy! This rich, gooey, espresso-infused cake is absolutely irresistible.
🌟 Tips & Variations
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