Heat a heavy bottomed saucepan on low.
Add butter, cream, powdered sweetener, and allulose to the pan.
Allow to heat very slowly on low temperature, stirring constantly to prevent burning the sweeteners.
Once you see tiny bubbles forming around the edges of the pan, stop stirring.
Using a candy thermometer, allow the mixture to come to 238℉. Do NOT stir at this point! This can take anywhere from 5-10+ minutes. It's best to let this step happen slowly. Be patient!
Once your mixture comes to temperature, remove it from heat and pour into the dry mixture.
Using an electric mixer, beat the mixture together on medium speed for about 5 minutes.
After 2-3 minutes of beating the fudge, add your extracts. Continue mixing well.
Once the fudge is thick like brownie batter, transfer to prepared pan.
Press fudge evenly into the pan and allow it to fully cool on the counter.
Once fully cooled, cut into bite-sized cubes.
Store in an airtight container on the counter for up to 5 days or in the fridge for several weeks.