Fudgy Chocolate Mug Cake

Prep time: 2 minutes | Cook time: 1–2 minutes | Servings: 1

Essential Ingredients

For the best results, use standard level measuring spoons and high-quality ingredients.

  • 4 tbsp All-Purpose Flour: Provides the necessary structure.
  • 2 tbsp Unsweetened Cocoa Powder: The heart of the chocolate flavor; use Dutch-processed for extra richness.
  • 2 tbsp Granulated Sugar (or 1-point equivalent): Adjust to your desired sweetness level.
  • 1/4 tsp Baking Powder: Crucial for that signature “lift” and light texture.
  • Pinch of Salt: Enhances the depth of the chocolate.
  • 3 tbsp Milk (Dairy or Plant-based): Provides moisture and binds the batter.
  • 2 tbsp Vegetable Oil (or melted butter): Adds the necessary fat for a fudgy mouthfeel.
  • 1/4 tsp Vanilla Extract: Rounds out the flavor profile.
  • Optional: 1 tbsp mini chocolate chips for a “lava” effect.

Step-by-Step Professional Instructions

  1. Selection of the Vessel: Choose a microwave-safe mug that holds at least 12 ounces. A straight-sided mug is recommended for even rising and to prevent overflow.
  2. Combine Dry Ingredients: Add the flour, cocoa powder, sugar, baking powder, and salt directly into the mug.
  3. Whisk for Texture: Use a small whisk or fork to mix the dry ingredients thoroughly. This breaks up cocoa lumps and ensures the leavening agent is evenly distributed.
  4. Incorporate Wet Ingredients: Pour in the milk, oil, and vanilla extract.
  5. The Perfect Batter: Stir until the mixture is completely smooth and creamy. Be sure to scrape the bottom “corners” of the mug to incorporate any hidden dry spots.
  6. Optional Add-ins: If using, gently fold in chocolate chips or nuts now. For a molten center, drop a single square of chocolate into the middle of the batter without pushing it to the bottom.
  7. The Microwave Stage: Place the mug in the center of your microwave. Cook on High power for 60–90 seconds.
  8. Monitor the Rise: Watch carefully through the door. The cake will rise significantly above the rim of the mug—don’t be alarmed!.
  9. Checking for Doneness: The cake is ready when the top looks set and springy to the touch but still slightly moist in the center. Avoid overcooking at all costs, as even 10 extra seconds can result in a rubbery texture.
  10. The Resting Period: This is the most underrated step. Let the cake sit undisturbed for 1–2 minutes. This allows the internal structure to set and makes the texture significantly fudgier.

Expert Tips for Success

  • The Power Factor: Microwave wattages vary wildly. A 1000-watt microwave may only need 60 seconds, while a 700-watt unit might need the full 90. Always start with the shorter time and add 15-second increments if needed.
  • Avoid the Rubbery Trap: Rubbery mug cakes are usually caused by too much oil or overcooking. For a lighter, more “cake-like” texture, you can reduce the oil by half and replace it with unsweetened applesauce.
  • Customization: Make it your own! Add a teaspoon of instant espresso powder to intensify the chocolate, or a dollop of peanut butter in the center for a surprise filling.
  • Photography Tip: If you’re shooting for your website, use natural side lighting from a window to highlight the cake’s texture. A light dusting of powdered sugar or a fresh berry garnish can add professional contrast to your shots.