Instructions
Step 1 Preheat oven to 350°F (175°C) and line a baking pan with parchment paper. /nStep 2 In a large bowl, mix melted butter and brown sugar until smooth. /nStep 3 Add eggs and vanilla extract, mixing until well combined. /nStep 4 In another bowl, whisk together flour, baking powder, and salt, then gradually add to the wet mixture. /nStep 5 Pour the batter into the prepared pan and spread evenly. /nStep 6 Bake for 20–25 minutes until set and lightly golden. Let cool completely. /nStep 7 In a bowl, mix peanut butter, powdered sugar, milk, and vanilla extract until smooth and creamy. /nStep 8 Spread the frosting evenly over the cooled bars. /nStep 9 Slice into squares and serve.
Storage and Reheating Tips
Store in an airtight container at room temperature for up to 3 days or refrigerate for up to 5 days.
For best texture, bring to room temperature before serving.
These bars can be frozen for up to 2 months; thaw before serving.
Avoid reheating, as they are best enjoyed at room temperature.
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