Assuming you have already created and activated your Anaconda environment, follow these steps:
conda install -c anaconda ipykernel- Win/Mac:
python -m ipykernel install --user --name=REPLACE_WITH_CONDA_ENVIRONMENT_NAME - Linux:
python -m ipykernel install --user --name=$CONDA_DEFAULT_ENV
$CONDA_DEFAULT_ENVtranslates to current environment name