In a large mixing bowl, combine the slightly melted plant-based butter and 1¼ cups peanut butter.

Mix until smooth and fully combined.

Add the powdered sugar and mix until incorporated.

Gently fold in the crushed graham crackers until evenly distributed throughout the mixture.

Transfer the mixture to an 8x8-inch or 9x9-inch baking dish.

Press the mixture into an even layer using a spatula or the back of a spoon.

Place the dish in the refrigerator while preparing the chocolate topping.

Add the chocolate chips and ¼ cup peanut butter to a microwave-safe bowl.

Microwave in 30-second intervals, stirring between each interval, until completely melted and smooth.

Pour the melted chocolate mixture over the peanut butter layer and spread evenly.

Refrigerate for at least 1½ hours, or until fully set.

Slice into bars and serve.