• Mix Dry Ingredients: In a bowl, whisk together flour, sugar, cocoa powder, baking powder, and salt.
• Combine Wet Ingredients: In a separate bowl, whisk together milk, vegetable oil, egg, and vanilla extract until well combined.
• Blend Wet and Dry: Add the wet ingredients to the dry ingredients and stir until just combined. Be careful not to overmix.
• Create Swirls: Scoop spoonfuls of batter into each muffin cup, filling them about halfway. Drop small dollops of peanut butter on top of the batter. Use a toothpick or a skewer to swirl the peanut butter into the batter, creating a marbled effect.
• Bake: Bake for about 18-20 minutes or until a toothpick inserted into the center of a muffin comes out clean.
• Cool and Enjoy: Allow the muffins to cool in the tin for a few minutes before transferring them to a wire rack to cool completely.

Notes:

• Peanut butter consistency: Warm the peanut butter slightly to make swirling easier.
• Creative additions: Experiment with chocolate chips, nuts, or even a sprinkle of sea salt on top.
• Storage: Keep the muffins in an airtight container to maintain their freshness.
• Serve with love: These muffins are a wonderful treat to share with loved ones over a warm cup of coffee or tea.