No candy thermometer needed: this fudge skips the stovetop entirely, using microwave heat to melt peanut butter into creamy, three-minute confectioners sugar magic.
Peanut Butter Microwave Fudge
Super quick and easy peanut butter fudge made in the microwave.
Prep
0
min
Cook
3
min
Serves
4
people
Level
beginner
The Story
This microwave shortcut traces back to 1970s American suburbia, when busy housewives abandoned George Washington Carver-era stovetop peanut candy methods for the newfangled microwave box sitting in their kitchens—turning a fussy candy thermometer affair into a lazy five-minute job, proving that sometimes American ingenuity just means finding the quickest route to sugar.
Regional Twist
Down in Georgia, peanut country itself, cooks swap standard peanut butter for fresh-ground boiled peanut paste and stir in a spoonful of local sorghum syrup alongside the butter, giving this microwave fudge a caramelized, farmhouse depth that Yankees with their jar of Skippy simply cannot replicate.
📝 Ingredients
🥛Dairy & Eggs(2)
- 2 T butter
- 1/3 C milk
🫙Pantry Staples(2)
- 1 lb box Confectioners sugar
- 1 C peanut butter
Nutrition (per serving)
Calories
425
Protein
8g
Carbs
59g
Fat
19g
👨🍳 Instructions
- 1
Place sugar, butter, and milk in a large mixing bowl.
- 2
Cook in the microwave for 2 minutes on high.
- 3
Take out, beat ingredients with a hand mixer until combined.
- 4
Microwave 30 seconds more, then add peanut butter and mix by hand or mixer until combined.
- 5
Spread in foil-lined 8x8 pan.
- 6
Let cool, then cut and enjoy!
💡 Pro Tips
- ✓Heat the sugar-butter-milk mixture to 238-242°F (soft-ball stage) before adding peanut butter, as this temperature allows sucrose crystals to fully dissolve and prevents graininess from recrystallization during cooling.timing238-242°F | 2 minutes 30 seconds total microwave time
- ✓Add peanut butter at exactly 110-115°F (warm but not hot) so its fat content emulsifies gradually with the sugar syrup rather than separating; cooler temperatures cause fat separation, while hotter temperatures cause the peanut butter to break down and weep oil.technique110-115°F | wait 2-3 minutes after final microwave burst before adding
- ✓Use natural peanut butter with 4-5% added oil rather than conventional peanut butter (15-20% added oil), as excess oil prevents proper emulsification and results in a greasy, separated fudge texture.ingredient4-5% oil content | avoid 15-20% oil brands
- ✓Line your pan with parchment paper instead of foil and refrigerate the fudge for exactly 4 hours at 40°F; this allows the sugar syrup to fully set while peanut butter's cocoa butter crystals stabilize, preventing the fudge from becoming either too soft or too brittle.equipment4 hours at 40°F refrigeration
Share this recipe
Prep
0
min
Cook
3
min
Serves
4
people
Level
beginner
Share this recipe
No candy thermometer needed: this fudge skips the stovetop entirely, using microwave heat to melt peanut butter into creamy, three-minute confectioners sugar magic.
Peanut Butter Microwave Fudge
Super quick and easy peanut butter fudge made in the microwave.
The Story
This microwave shortcut traces back to 1970s American suburbia, when busy housewives abandoned George Washington Carver-era stovetop peanut candy methods for the newfangled microwave box sitting in their kitchens—turning a fussy candy thermometer affair into a lazy five-minute job, proving that sometimes American ingenuity just means finding the quickest route to sugar.
Regional Twist
Down in Georgia, peanut country itself, cooks swap standard peanut butter for fresh-ground boiled peanut paste and stir in a spoonful of local sorghum syrup alongside the butter, giving this microwave fudge a caramelized, farmhouse depth that Yankees with their jar of Skippy simply cannot replicate.
📝 Ingredients
🥛Dairy & Eggs(2)
- 2 T butter
- 1/3 C milk
🫙Pantry Staples(2)
- 1 lb box Confectioners sugar
- 1 C peanut butter
Nutrition (per serving)
Calories
425
Protein
8g
Carbs
59g
Fat
19g
👨🍳 Instructions
- 1
Place sugar, butter, and milk in a large mixing bowl.
- 2
Cook in the microwave for 2 minutes on high.
- 3
Take out, beat ingredients with a hand mixer until combined.
- 4
Microwave 30 seconds more, then add peanut butter and mix by hand or mixer until combined.
- 5
Spread in foil-lined 8x8 pan.
- 6
Let cool, then cut and enjoy!
💡 Pro Tips
- ✓Heat the sugar-butter-milk mixture to 238-242°F (soft-ball stage) before adding peanut butter, as this temperature allows sucrose crystals to fully dissolve and prevents graininess from recrystallization during cooling.timing238-242°F | 2 minutes 30 seconds total microwave time
- ✓Add peanut butter at exactly 110-115°F (warm but not hot) so its fat content emulsifies gradually with the sugar syrup rather than separating; cooler temperatures cause fat separation, while hotter temperatures cause the peanut butter to break down and weep oil.technique110-115°F | wait 2-3 minutes after final microwave burst before adding
- ✓Use natural peanut butter with 4-5% added oil rather than conventional peanut butter (15-20% added oil), as excess oil prevents proper emulsification and results in a greasy, separated fudge texture.ingredient4-5% oil content | avoid 15-20% oil brands
- ✓Line your pan with parchment paper instead of foil and refrigerate the fudge for exactly 4 hours at 40°F; this allows the sugar syrup to fully set while peanut butter's cocoa butter crystals stabilize, preventing the fudge from becoming either too soft or too brittle.equipment4 hours at 40°F refrigeration