These bite-size peanut butter candy bars are made with just 3 ingredients in about 10 minutes! Perfectly peanutty, sweet, and slightly crispy, you will love these!
Line a 6x3.5-inch pan with parchment paper. Note: You can use any pan as long as it is about this size.
To a small saucepan, add the peanut butter and vanilla extract. Heat over low heat and stir it from time to time.
To another medium saucepan, add the sugar and water. Bring to a boil over medium heat. Using a candy thermometer, measure the heat of the syrup. You want the syrup to reach a temperature of 257 °F (125°C).
As soon as the syrup reaches this temperature, turn off the heat and immediately pour in the hot peanut butter. Use a wooden spatula or spoon to quickly stir the peanut butter into the syrup.
Once the peanut butter and syrup are fully combined (it should only take a few seconds), pour the mixture into the prepared pan. Be careful; the mixture will harden very fast, so you want to act quickly.
Let the mixture cool for about 5 minutes before removing it from the pan and cutting it into small bars.
Notes
Do not omit to heat the peanut butter. The sugar syrup will crystallize too quickly if your peanut butter is cold or at room temperature.
Monitor the temperature of the sugar. For the best texture, use a candy thermometer to make sure the sugar has reached the desired temperature. Your candies will be too soft if the sugar syrup is not hot enough. On the contrary, if you heat the sugar to a too-high temperature, your bars will be too hard and crumbly.
Slice while still warm. As they cool down, the bars will harden and become crumbly. Slice into bars using a very sharp knife while the mixture is still slightly warm.
Slice into tiny bars. These peanut butter candy bars are pretty sweet and should be enjoyed as a treat, so I recommend cutting them into 1-inch-long bars.