3-4Tbsppowdered sugar {amount depends on sweetness of berries}
Instructions
1. Chill bowl and beaters {whisk attachment, if possible} in the freezer for 10-15 minutes until ready to use.
2. Place the raspberries and 1/4 cup of the heavy whipping cream in chilled mixing bowl. Beat on low speed for 1 minute and then increase speed to medium for another 1-2 minutes until raspberries are completely mashed up.
3. Strain mixture through a fine mesh sieve, using a spatula to press mixture all the way through, and discard seeds and pulp. Pour raspberry cream back into mixing bowl.
4. Add remaining whipping cream and beat on low for 1-2 minutes, or until the mixture begins getting foamy. Add in powdered sugar and increase speed to medium/high. Beat for an additional 2-3 minutes until soft peaks form.
Notes
You could substitute frozen berries if desired, just be sure to thaw and strain the berries before adding them to the cream.